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Words That Start With U

Dictionary words beginning with the letter U, each with its definition.

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300 Words

  1. 1 up Toward or in a higher position; away from the ground.
  2. 2 us The object form of "we" — used to refer to the speaker together with one or more other people.
  3. 3 use To employ something for a particular purpose.
  4. 4 used Previously owned or employed by someone else; not new.
  5. 5 under Below or beneath something, in position.
  6. 6 until Up to the point in time that something happens.
  7. 7 using Present participle of use — employing something for a purpose.
  8. 8 united Joined together as one; in agreement.
  9. 9 understand To grasp the meaning of something.
  10. 10 university An institution of higher education offering degrees, teaching, and research.
  11. 11 upon A more formal or literary word for "on".
  12. 12 usually Under normal conditions; most of the time.
  13. 13 union An organized group of workers formed to protect their rights and negotiate with employers.
  14. 14 unless Except if; on the condition that something does not happen.
  15. 15 unit A single, whole thing, especially one regarded as a standard measure or a self-contained part of something lar...
  16. 16 uses Third-person singular present tense of use — to employ something for a purpose.
  17. 17 understanding The mental grasp of what something means or how it works.
  18. 18 Un A Korean given name element and surname, also familiarly used to refer to North Korean leader Kim Jong Un.
  19. 19 useful Able to be used effectively; helpful for a practical purpose.
  20. 20 useR A person who uses something, especially a product, service, or piece of technology.
  21. 21 unique Being the only one of its kind; unlike anything else.
  22. 22 upper Positioned higher, in rank, level, or physical location, than something else.
  23. 23 urban Relating to, or located in, a city or town, as opposed to the countryside.
  24. 24 update A piece of new or more current information about something.
  25. 25 unable Not having the ability, power, or means to do something.
  26. 26 understood Grasped or accepted without needing to be stated directly.
  27. 27 unfortunately Happening as a result of bad luck or misfortune.
  28. 28 universe All of space, time, matter, and energy that exists.
  29. 29 usual Happening or done most of the time; typical or expected.
  30. 30 upset Unhappy, distressed, or annoyed.
  31. 31 unknown Not known, identified, or familiar.
  32. 32 ultimately In the end; after everything else has been considered or has happened.
  33. 33 unlike Different from; in contrast to.
  34. 34 universal Applying to or shared by everyone or everything in a group.
  35. 35 ultimate Final; the last in a sequence, beyond which nothing more follows.
  36. 36 uncle The brother of one's mother or father, or the husband of one's aunt.
  37. 37 unusual Not usual or ordinary; out of the norm.
  38. 38 ugly Unpleasant to look at; not attractive.
  39. 39 Ukraine A country in Eastern Europe on the northern coast of the Black Sea, with Kyiv as its capital.
  40. 40 uniform A distinctive set of clothes worn by members of a particular group, such as a school, army, or company.
  41. 41 UPS To connect a device to a backup power supply so it stays on during an outage.
  42. 42 underground Located beneath the surface of the ground.
  43. 43 unlikely Not probable; not expected to happen.
  44. 44 unity The state of being one, whole, and undivided.
  45. 45 uh A filler sound used while thinking or hesitating in speech.
  46. 46 um A filler sound used to express hesitation or uncertainty while speaking.
  47. 47 usage The act or amount of using something, such as electricity, data, or a resource.
  48. 48 underlying Situated beneath or below something else.
  49. 49 unemployment The state of not having a paid job.
  50. 50 upcoming Happening or arriving in the near future.
  51. 51 unnecessary Not needed; more than is required.
  52. 52 utility The quality of being useful or practical.
  53. 53 useless Not able to be used; serving no practical purpose.
  54. 54 Ukrainian Relating to Ukraine, its people, or its language.
  55. 55 unexpected Not anticipated or predicted beforehand.
  56. 56 ugh Used to express disgust, annoyance, or repugnance.
  57. 57 urgent Needing immediate attention or action.
  58. 58 uncomfortable Causing physical discomfort.
  59. 59 upgrade An improved version of something, often a piece of technology or equipment.
  60. 60 ultra Extreme; going far beyond what is normal or moderate.
  61. 61 unfair Not fair or just; treating people unequally or wrongly.
  62. 62 urge A strong impulse or desire to do something.
  63. 63 unto An old-fashioned or formal word for "to", especially showing direction or an indirect object.
  64. 64 uncertainty A state of doubt or lack of sureness about something.
  65. 65 unfortunate Having bad luck; suffering misfortune.
  66. 66 unhappy Feeling or showing sadness.
  67. 67 unlimited Having no limit or restriction.
  68. 68 Utah A state in the western United States, whose capital is Salt Lake City.
  69. 69 unbelievable So surprising or extraordinary that it is hard to accept as true.
  70. 70 underneath Below or beneath something, often in contact with it.
  71. 71 uncertain Not sure or confident about something.
  72. 72 utterly Completely; totally; to the fullest extent.
  73. 73 unclear Not obvious or easy to understand; ambiguous.
  74. 74 unacceptable Not good enough to be allowed, approved of, or tolerated.
  75. 75 unconscious Not awake and unaware of one's surroundings, often due to injury or illness.
  76. 76 underway In progress or already started.
  77. 77 unemployed Without a job, despite being able and willing to work.
  78. 78 upside The positive or advantageous side of a situation.
  79. 79 unaware Not knowing about or noticing something.
  80. 80 underwear Clothing worn directly against the skin, beneath outer clothes.
  81. 81 underwater Existing or happening beneath the surface of water.
  82. 82 unite To bring together as one; to join.
  83. 83 upload To send data from your own device to a server or another computer over a network.
  84. 84 umbrella A portable folding frame covered in fabric, held overhead to give shelter from rain or sun.
  85. 85 unstable Likely to shift, collapse, or change suddenly; not firmly fixed.
  86. 86 upgraded Having been improved or replaced with a better version.
  87. 87 undergo To experience or go through something, especially a difficult or significant process.
  88. 88 undoubtedly Without any doubt; certainly.
  89. 89 unified Brought together into a single whole; acting as one.
  90. 90 uncommon Not often found or seen; rare.
  91. 91 uranium A heavy, silvery-grey radioactive metal (element 92), used as fuel in nuclear reactors and in nuclear weapons.
  92. 92 upstairs To or on a higher floor of a building.
  93. 93 urine The liquid waste produced by the kidneys and released from the body through the bladder.
  94. 94 Uganda A landlocked country in East Africa, known for its lakes and wildlife.
  95. 95 unprecedented Never having happened or been seen before.
  96. 96 undertake To take on a task or responsibility and commit to completing it.
  97. 97 unchanged Staying exactly the same; not altered in any way.
  98. 98 username A name someone chooses to identify themselves when logging into a computer system, app, or website.
  99. 99 unsuccessful Not achieving the intended result; having failed.
  100. 100 uprising A rebellion or revolt by a group of people against those in power.
  101. 101 utter Complete and total; absolute.
  102. 102 undertaking A task or project that someone takes responsibility for, especially a large or difficult one.
  103. 103 unrelated Having no connection or link to something else.
  104. 104 ur A filler sound used while hesitating or searching for words, similar to "er" or "um."
  105. 105 unlock To open something that is locked, such as a door or device.
  106. 106 unwanted Not wanted or welcome.
  107. 107 uploaded Having been sent from a device to a server or another computer.
  108. 108 understandable Able to be understood; clear.
  109. 109 unpleasant Not enjoyable; causing discomfort or displeasure.
  110. 110 unsure Not certain or confident about something.
  111. 111 updating The process of bringing something up to date.
  112. 112 Uruguay A country in South America, on the Atlantic coast between Argentina and Brazil.
  113. 113 uber Informal: extremely, or the ultimate example of something.
  114. 114 unusually In a way that is not typical; more than normal.
  115. 115 upwards Toward a higher position; up.
  116. 116 upright Standing straight up, vertical.
  117. 117 upward Moving from a lower position to a higher one.
  118. 118 unlocked Not secured with a lock.
  119. 119 unreasonable Not guided by sound judgment or reason; excessive or unfair given the circumstances.
  120. 120 utilize To make practical use of something.
  121. 121 utilized Put to use; employed for a purpose.
  122. 122 Una A feminine given name of Irish origin, meaning "lamb," also used as an anglicization of the Latin "una," meani...
  123. 123 undercover Carried out secretly, especially as part of an investigation.
  124. 124 unwilling Not willing to do something; reluctant.
  125. 125 unavailable Not able to be obtained, used, or reached at a given time.
  126. 126 uncovered Not protected by a cover, roof, or similar shelter.
  127. 127 undergraduate A university student who has not yet earned a degree.
  128. 128 undermine To weaken support or confidence gradually, often secretly.
  129. 129 unveiled Not wearing or covered by a veil.
  130. 130 unfamiliar Not known or recognised; strange.
  131. 131 unhealthy Harmful to health, or lacking good health.
  132. 132 unpredictable Impossible to know or foresee in advance.
  133. 133 underestimate To judge something to be smaller, less important, or less difficult than it actually is.
  134. 134 unfinished Not completed; still in progress.
  135. 135 unexpectedly In a way that surprises; without warning.
  136. 136 uni Informal British/Australian term for university.
  137. 137 unpopular Not liked or supported by most people.
  138. 138 unanimous Agreed to by everyone, with no one dissenting.
  139. 139 unlawful Against the law; not legally permitted.
  140. 140 unlucky Having or bringing bad luck.
  141. 141 unpaid Not yet paid.
  142. 142 unsafe Likely to cause harm or injury; not safe.
  143. 143 upgrading The process of replacing something with an improved version.
  144. 144 unanimously With everyone in agreement; without any dissent.
  145. 145 utmost The greatest or most extreme possible.
  146. 146 universally By everyone, or in every case, without exception.
  147. 147 unofficial Not formally recognized or authorized.
  148. 148 unrest A state of disorder, protest, or agitation, especially among a population.
  149. 149 ut An old name for the first note of the musical scale, later replaced by "do" in solfège.
  150. 150 unused Not put to use.
  151. 151 unarmed Not carrying a weapon.
  152. 152 upstream Positioned or moving against the direction a river or current flows.
  153. 153 urgency The quality of needing immediate attention or action.
  154. 154 unseen Not seen or noticed; invisible or hidden from view.
  155. 155 unidentified Not identified; whose name or nature is unknown.
  156. 156 unconstitutional Conflicting with or forbidden by a country's constitution.
  157. 157 undefeated Having never lost; still winning every match or contest so far.
  158. 158 uphold To support or maintain something, such as a law, principle, or standard.
  159. 159 uniquely In a way that is unique or one of a kind.
  160. 160 unjust Not fair or right; failing to treat people as they deserve.
  161. 161 unreliable Not able to be trusted or depended on to perform consistently.
  162. 162 Ulster A historic province in the north of Ireland, made up of six counties in Northern Ireland and three in the Repu...
  163. 163 unreal Not real; existing only in imagination or seeming to lack the solidity of reality.
  164. 164 unrealistic Not based on a sensible or practical view of what is possible; not realistic.
  165. 165 upsetting Causing distress or sadness.
  166. 166 urgently In a way that shows or requires immediate attention.
  167. 167 uneven Not flat or level; having bumps, dips, or irregularities.
  168. 168 unnamed Not given a name.
  169. 169 uncover To remove something that was covering an object.
  170. 170 unification The act or process of joining separate parts into a single whole.
  171. 171 ultrasound Sound waves at a frequency too high for humans to hear.
  172. 172 usher A person who shows people to their seats, for example at a wedding, cinema, or theatre.
  173. 173 ufo An unidentified flying object — something seen in the sky that cannot be readily explained, often associated w...
  174. 174 unauthorized Done without official permission.
  175. 175 unconditional Given completely, with no conditions, limits, or exceptions attached.
  176. 176 unicorn A mythical horse-like creature with a single horn growing from its forehead.
  177. 177 usable Able to be used, especially in a practical or convenient way.
  178. 178 unmarried Not married; single.
  179. 179 unbearable So unpleasant, painful, or difficult that it feels impossible to put up with.
  180. 180 undo To reverse or cancel the effect of something already done.
  181. 181 unforgettable So memorable that it cannot easily be forgotten.
  182. 182 unnoticed Not noticed or seen.
  183. 183 upbeat Cheerful, optimistic, and positive in tone.
  184. 184 UL To upload a file to the internet or a server.
  185. 185 undue More than is reasonable or necessary; excessive.
  186. 186 unnatural Not occurring naturally, or not in keeping with what is normal or expected.
  187. 187 untouched In its original condition; not damaged or altered in any way.
  188. 188 utopia An imagined place or state of affairs in which everything is perfect.
  189. 189 underworld The organized criminal side of society, especially those involved in serious or large-scale crime.
  190. 190 uneasy Feeling worried, nervous, or not at ease.
  191. 191 unfit Not suitable or qualified for a particular purpose or role.
  192. 192 unpublished Not yet made publicly available in print or online.
  193. 193 usefulness How helpful or practical something is.
  194. 194 underwood Low shrubs, bushes, and small trees growing beneath the taller trees of a forest.
  195. 195 upbringing The way a person was raised and the values instilled in them during childhood.
  196. 196 unavoidable Not able to be avoided or prevented; bound to happen.
  197. 197 unilateral Undertaken by only one side or party, without agreement from others involved.
  198. 198 unstoppable Impossible to stop or prevent from continuing.
  199. 199 underage Below the legal age required for an activity, such as drinking or driving.
  200. 200 unnecessarily In a way that is not needed.
  201. 201 unattractive Not pleasing in appearance.
  202. 202 unconventional Not following the usual customs, rules, or accepted way of doing things.
  203. 203 undesirable Not wanted; unpleasant or likely to cause problems.
  204. 204 unheard Not perceived by the ear; not heard.
  205. 205 untrue Not true; false.
  206. 206 uptake The ability to understand or grasp something quickly.
  207. 207 ubiquitous Seeming to be everywhere at once; found absolutely everywhere.
  208. 208 unfold To open out something that was folded.
  209. 209 unresolved Not yet settled or brought to a conclusion.
  210. 210 Upton An English surname and given name, originally a place name meaning "upper settlement."
  211. 211 uterus The organ in the female reproductive system where a fetus develops before birth.
  212. 212 underrated Not given as much credit or recognition as it deserves.
  213. 213 unequal Not the same in size, amount, value, or status.
  214. 214 ultraviolet Describing light or radiation with a wavelength shorter than visible light, invisible to the human eye.
  215. 215 unaffected Not changed or influenced by something.
  216. 216 unanswered Not yet answered, responded to, or resolved.
  217. 217 unfolding The gradual process of something becoming clear or happening.
  218. 218 unintended Not planned or meant to happen.
  219. 219 unleashed Freed from a leash or from any restraint.
  220. 220 Uzbekistan A landlocked country in Central Asia, whose capital is Tashkent.
  221. 221 umpire An official who oversees a sports match and enforces its rules, such as in baseball, cricket, or tennis.
  222. 222 unbelievably To a degree that is hard to believe; extremely.
  223. 223 unborn Not yet born; still developing in the womb.
  224. 224 unsuitable Not right or appropriate for a particular purpose or situation.
  225. 225 upfront Honest and direct, especially about something that might be uncomfortable to say.
  226. 226 uploading The process of sending data from a device to a server.
  227. 227 undermining The act of gradually weakening someone or something, often through subtle or indirect means.
  228. 228 undone Not finished or completed.
  229. 229 UNICEF The United Nations agency that provides humanitarian aid and support to children around the world.
  230. 230 unprotected Lacking protection or defense; exposed to harm.
  231. 231 unsuccessfully Without achieving the desired result.
  232. 232 uphill Going up a slope; located higher on a hill.
  233. 233 undeniable So clearly true that it cannot reasonably be argued against.
  234. 234 unfounded Not based on facts or solid evidence.
  235. 235 ungrateful Not thankful; failing to show appreciation for something received.
  236. 236 uniting The act of joining separate things into one.
  237. 237 uno What a player shouts in the card game Uno when down to their last card.
  238. 238 unleash To release from a leash or restraint.
  239. 239 untreated Not given medical care or a chemical process meant to fix, protect, or purify it.
  240. 240 uncanny Strange in a way that feels unsettling or almost supernatural.
  241. 241 unexplained Not yet accounted for; of unknown cause.
  242. 242 unfairly In a manner that is not fair or just.
  243. 243 unrestricted Not limited or confined by rules, boundaries, or conditions.
  244. 244 upstate The northern or more rural part of a US state, away from its main city.
  245. 245 urinary Relating to urine or the organs that produce and pass it.
  246. 246 ultimatum A final demand or set of terms, often carrying a threat if not accepted by a deadline.
  247. 247 uncontrolled Not kept in check or under anyone's control.
  248. 248 unmanned Operating without a human crew or operator.
  249. 249 uptown The residential or outer part of a city, away from the main business district.
  250. 250 understatement A statement that presents something as smaller, milder, or less significant than it really is, sometimes for i...
  251. 251 UNISON The state of matching pitch, sound, or action perfectly together.
  252. 252 uninterrupted Continuing without any break or interruption.
  253. 253 unloading The process of removing cargo or contents from something.
  254. 254 unimportant Not important; of little significance.
  255. 255 unsatisfactory Not good enough to meet expectations or requirements.
  256. 256 unsolved Not yet worked out or explained.
  257. 257 unthinkable So extreme or unlikely that it seems impossible to imagine happening.
  258. 258 Ulysses A masculine given name, the Latin form of Odysseus, the hero of Homer's Odyssey, also borne by U.S. President...
  259. 259 underdog A competitor who is expected to lose.
  260. 260 undisclosed Not revealed or made public; kept secret.
  261. 261 unduly To an excessive or unwarranted degree.
  262. 262 unethical Not conforming to accepted moral or professional standards.
  263. 263 unsettled Feeling anxious, disturbed, or uneasy.
  264. 264 unbalanced Lacking stability or equal proportion; not balanced.
  265. 265 unbroken Whole and intact; not split or damaged.
  266. 266 understandably For reasons that make sense or are easy to sympathize with.
  267. 267 unparalleled So exceptional that nothing else compares to it.
  268. 268 unprepared Not ready for something; caught off guard.
  269. 269 untold Never revealed or spoken about; kept secret.
  270. 270 urn A decorative vase, often with a rounded body and narrow neck, set on a footed base.
  271. 271 uniqueness The quality of being unique or one of a kind.
  272. 272 unload To remove cargo or goods from a vehicle, ship, or container.
  273. 273 upheaval A sudden, dramatic change that disrupts the normal state of things.
  274. 274 unc Informal slang for a man seen as old, out of touch, or behind on current youth culture and trends.
  275. 275 unconditionally Without any conditions or limitations.
  276. 276 unloaded Having had its load or cargo removed.
  277. 277 undisputed Accepted by everyone as true or correct, with no argument against it.
  278. 278 unfolded Not folded; opened out flat.
  279. 279 unintentionally Without meaning to; by accident.
  280. 280 unmarked Having no identifying marks or labels.
  281. 281 uplifting Making people feel happier or more hopeful.
  282. 282 Ursula A feminine given name of Latin origin, meaning "little bear."
  283. 283 unbiased Not favoring one side over another; fair and impartial.
  284. 284 uncontrollable Impossible to control, contain, or manage.
  285. 285 unsettling Causing a feeling of unease, anxiety, or disturbance.
  286. 286 unsigned Not carrying a signature; unendorsed.
  287. 287 unveiling The act of removing a cover to reveal something.
  288. 288 unworthy Not deserving respect, attention, or a particular honor.
  289. 289 upholding The act of supporting or maintaining something.
  290. 290 uproar A loud, chaotic outburst of noise, protest, or anger.
  291. 291 utopian Relating to or resembling a utopia; ideal but unrealistic.
  292. 292 unattended Left alone, with no one watching or supervising.
  293. 293 underside The bottom or lower surface of something.
  294. 294 unforeseen Not expected or predicted in advance.
  295. 295 unsustainable Not able to be kept up or maintained over time, especially without causing harm.
  296. 296 Uri A masculine given name of Hebrew origin, meaning "my light" or "my flame," also a canton in Switzerland.
  297. 297 undertaker A person or business that arranges funerals, including preparing the body and organizing the burial or cremati...
  298. 298 uneducated Not having received much or any formal schooling.
  299. 299 unifying Bringing people or things together; creating a sense of unity.
  300. 300 unintentional Done without meaning to; not deliberate.