ninetieth
nine·ti·eth/ˈnaɪn.ti.əθ/adjective, noun
ninetieth is an adjective meaning “The ordinal form of the number ninety” (English Wiktionary, September 2026). It is spelled N-I-N-E-T-I-E-T-H and has 3 syllables (nine·ti·eth), and it appears about once in every 18 million words in written English (wordfreq, 2021 data).
What does ninetieth mean?
adjective
- 1
The ordinal form of the number ninety.
noun
- 1
The person or thing in the ninetieth position.
- 2
One of ninety equal parts of a whole.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How do you pronounce ninetieth?
- /ˈnaɪn.ti.əθ/
Ninetieth has 3 syllables, split nine·ti·eth in writing.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-I_learned_some_phrases-ninetieth.wav, Wikimedia Commons (author and licence on each file's page).
Forms of ninetieth
- ninetieths plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is ninetieth?
Ninetieth appears about once in every 18 million words in written English, the 128,787th 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).
Ninetieth in Spanish, French, German and Portuguese
In the sense ordinal form of ninety:
| Language | Words |
|---|---|
| French | quatre-vingt-dixième, nonantième, 90^ |
| German | neunzigste |
| Portuguese | nonagésimo, 90º |
| Spanish | nonagésimo |
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 ninetieth come from?
From earlier ninteth, from Middle English nyntithe; for the modern form, see the etymological notes at twentieth.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).