ninety
/ˈnaɪn.ti/
Proposed by a contributor, not yet supported by evidence.
Meaning · English
The cardinal number occurring after eighty-nine and before ninety-one, represented in Roman numerals as XC and in Arabic numerals as 90.
Numeral
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “ninety” mean?
The cardinal number occurring after eighty-nine and before ninety-one, represented in Roman numerals as XC and in Arabic numerals as 90.
Is “ninety” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.