noun
Common
infinity
ihn-FIH-nih-tee
Infinity (noun) means a quantity or extent without any limit or end. Example: “Astronomers sometimes speak, loosely, of the universe stretching to infinity.”
noun
1
A quantity or extent without any limit or end.
"Astronomers sometimes speak, loosely, of the universe stretching to infinity."
"The symbol for infinity looks like a sideways figure eight."
"Two mirrors facing each other seemed to repeat the room to infinity."
How to use infinity
Learner’s notesIn plain EnglishA concept of endlessness — a value or distance with no limit.
Common pairings
approach infinity
to infinity
symbol of infinity
Vocabulary Flow
Build your vocabulary from words like infinity.
Vocabulary Flow serves the next word, and the next — meaning, pronunciation and an example each time. Practice at your level, or learn English in your own language.
Start vocabulary practice
Word forms
- Plural
- infinities
Fill the gap
Can you complete this real example?
Astronomers sometimes speak, loosely, of the universe stretching to _____.
Etymology
From Latin infinitas, "unlimitedness," from in- ("not") plus finis ("end").
Synonyms
View more →Antonyms
Related words
Rhymes for infinity
See all rhymes for infinity →Frequently asked questions
What does “infinity” mean?
The word “infinity” means a quantity or extent without any limit or end. In plain terms, a concept of endlessness — a value or distance with no limit.
How do you pronounce “infinity”?
“Infinity” is pronounced ihn-FIH-nih-tee ([ɪnˈfɪnɪɾi] in IPA).
How do you use “infinity” in a sentence?
Here is “infinity” used in a sentence: “Astronomers sometimes speak, loosely, of the universe stretching to infinity.”
What is another word for “infinity”?
Words with a similar meaning to “infinity” include boundlessness, endlessness, infiniteness, infinitude, limitlessness and unendingness.
What is the opposite of “infinity”?
The opposite of “infinity” — its antonyms — is finity.
What part of speech is “infinity”?
“Infinity” is a noun.
Where does the word “infinity” come from?
The word “infinity” comes from Latin. From Latin infinitas, "unlimitedness," from in- ("not") plus finis ("end").
Is “infinity” a common word?
“Infinity” is a fairly common word in modern English.
What is the difference between infinity and eternity?
Infinity refers to a quantity or extent without any limit or end, often used in mathematics and space, while eternity specifically refers to unending time. Infinity can describe endless space, numbers, or possibilities, not just time.
How is the infinity symbol used?
The infinity symbol, ∞, is used in mathematics to represent a quantity without any limit or end, such as in describing a sequence that increases without bound.
Can infinity be a real number?
No, infinity is not a real number because it represents an extent without any limit rather than a fixed, countable quantity, so it cannot be used in ordinary arithmetic the way finite numbers can.
