infinity
[ɪnˈfɪnɪɾi]noun
infinity is spelled I-N-F-I-N-I-T-Y. The wrong spelling people search most is infinty: about 520 Bing searches a month in the United States (September 2025 to August 2026), about 1 in 52 of all searches for the word. Infinity is a noun meaning “Endlessness, unlimitedness, absence of a beginning, end or limits to size”. The plural of infinity is infinities.
How many letters and syllables are in infinity?
| Letters | 8: I-N-F-I-N-I-T-Y |
|---|---|
| Syllables | 4 (from its American pronunciation) |
| In writing | 6.6 times per million words; the 9,313th most frequent word form |
| Wrong spellings searched | 1; the most searched, infinty, about 520 Bing searches a month (all of them) |
Sources: letters and syllables from the English Wiktionary's hyphenation or pronunciation and the CMU Pronouncing Dictionary; written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media); Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026).
How do you spell infinity?
Infinity is spelled I-N-F-I-N-I-T-Y. One wrong spelling is searched or written often enough to measure; together they are about 1 in 52 of the searches for infinity in either form.
Bing searches in the United States: the average month from September 2025 to August 2026 (Microsoft Advertising keyword data through DataForSEO, read September 30, 2026). Wrong spellings are taken from Wiktionary entries tagged "misspelling" and its obsolete or nonstandard forms, Wikipedia's Lists of common misspellings and the codespell dictionary, then measured. The proofreader's marks show the change that corrects each one.
How common is infinity?
Infinity appears 6.6 times per million words in written English, the 9,313th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How do you pronounce infinity?
- /ɪnˈfɪnɪti/
- US [ɪnˈfɪnɪɾi]
Infinity has 4 syllables (counted from its American pronunciation in the CMU Pronouncing Dictionary).
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Vealhurl-infinity.wav, LL-Q1860_(eng)-Wodencafe-infinity.wav, Wikimedia Commons (author and licence on each file's page).
Forms of infinity
- infinities plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
What does infinity mean?
The meanings the English Wiktionary records, quoted as written there (source below).
noun
- 1
Endlessness, unlimitedness, absence of a beginning, end or limits to size.
concept of infinity
- 2
A number that has an infinite numerical value that cannot be counted.
- 3
An idealised point which is said to be approached by sequences of values whose magnitudes increase without bound.
- 4
A number which is very large compared to some characteristic number. For example, in optics, an object which is much further away than the focal length of a lens is said to be "at infinity", as the distance of the image from the lens varies very little as the distance increases further.
- 5
The symbol ∞.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Infinity in Spanish, French, German and Portuguese
| Language | Words |
|---|---|
| French | infinité , infini |
| German | Unendlichkeit |
| Portuguese | infinito, infinidade |
| Spanish | infinidad , infinito |
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Translations are Wiktionary's, by sense; a linked word has its own PlainSpell page.
Where does infinity come from?
From Middle English infinite, from Old French infinité, from Latin īnfīnitās (“unlimitedness”), from negative prefix in- (“not”), + fīnis (“end”), + noun of state suffix -tās. By surface analysis, infinite + -ity.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).