infinity
Infinity (noun) means a quantity or extent without any limit or end. Example: “Astronomers sometimes speak, loosely, of the universe stretching to infinity.”
How to use infinity
Learner’s notesIn plain EnglishA concept of endlessness — a value or distance with no limit.
Word forms
infinities plural
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
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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.