ˈnaɪntɪ n. & adj. --n. (pl. -ies) 1
the product of
nine and ten. 2 a
symbol for this (90, xc, XC). 3 (in pl.) the numbers
from 90 to 99,
esp. the years of a
century or of a person's
life. --adj.
that amount to ninety. øninety-first, -second , etc. the
ordinal numbers
between ninetieth and a hundredth. ninety-one, -two , etc. the
cardinal numbers between ninety and a
hundred. øøninetieth adj. & n. ninetyfold adj. & adv. [OE nigontig]