Meaning of ninety

nine•ty

Pronunciation: (nīn'tē), [key]
— n., pl. adj. -ties,
—n.
  1. a cardinal number, ten times nine.
  2. a symbol for this number, as 90 or XC.
  3. a set of this many persons or things.
  4. 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.
—adj.
  1. amounting to 90 in number.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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