'Ninety' definitions:

Definition of 'ninety'

From: WordNet
adjective
Being ten more than eighty [syn: ninety, 90, xc]
noun
The cardinal number that is the product of ten and nine [syn: ninety, 90, XC]

Definition of 'Ninety'

From: GCIDE
  • Ninety \Nine"ty\, a. [See Nine, and cf. Forty.] Nine times ten; eighty-nine and one more; as, ninety men. [1913 Webster]

Definition of 'Ninety'

From: GCIDE
  • Ninety \Nine"ty\, n.; pl. Nineties.
  • 1. The sum of nine times ten; the number greater by a unit than eighty-nine; ninety units or objects. [1913 Webster]
  • 2. A symbol representing ninety units, as 90 or xc. [1913 Webster]