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ninety

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noun nine·ty \ˈnīn-tē\

Simple Definition of ninety

  • : the number 90

  • nine*ties : the numbers ranging from 90 to 99

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

Full Definition of ninety

plural nineties

  1. 1 — see number table

  2. 2 plural :  the numbers 90 to 99; specifically :  the years 90 to 99 in a lifetime or century

nine·ti·eth play \-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




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