Webster's Revised Unabridged Dictionary · 1913

Ninety

Ninety , adjective

[See Nine, and compare Forty.]

Nine times ten; eighty-nine and one more; as, ninety men.

Ninety ({not transcribed}) , noun

1.
The sum of nine times ten; the number greater by a unit than eighty-nine; ninety units or objects.
2.
A symbol representing ninety units, as 90 or xc.