noun nine·ty \ˈnīn-tē\

: the number 90

nine*ties : the numbers ranging from 90 to 99

: a set of years ending in digits ranging from 90 to 99

plural nineties

Full Definition of NINETY

— see number table
plural :  the numbers 90 to 99; specifically :  the years 90 to 99 in a lifetime or century
nine·ti·eth \-tē-əth\ adjective or noun
ninety adjective
ninety pronoun, plural in construction

Examples of NINETY

  1. During the nineties, he was going to college and working part-time.

Origin of NINETY

Middle English ninety, adjective, from Old English nigontig, short for hundnigontig, from hundnigontig, noun, group of 90, from hund-, literally, hundred + nigon nine + -tig group of 10; akin to Old English tīen ten
First Known Use: before 12th century

Other Number-Related Terms

jubilee, myriad, quarantine, score, twain
NINETY Defined for Kids


adjective nine·ty \ˈnīn-tē\

Definition of NINETY for Kids

:  being nine times ten



Definition of NINETY for Kids

:  nine times ten :  90
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