- a cardinal number, ten times nine.
- a symbol for this number, as 90 or XC.
- a set of this many persons or things.
- the numbers, years, degrees, or the like, from 90 through 99, as in referring to numbered streets, indicating the years of a lifetime or of a century, or degrees of temperature: His grandmother is in her nineties.
- amounting to 90 in number.
- the cardinal number that is the product of ten and nine
- a numeral, 90, XC, etc, representing this number
- something represented by, representing, or consisting of 90 units
- amounting to ninety
- (as pronoun)
