ninety

noun

nine·​ty ˈnīn-tē How to pronounce ninety (audio)
plural nineties
1
: a number equal to nine times 10 see Table of Numbers
2
nineties plural : the numbers 90 to 99
specifically : the years 90 to 99 in a lifetime or century
She's in her nineties.
ninetieth adjective or noun
ninety adjective
ninety pronoun, plural in construction

Examples of ninety in a Sentence

During the nineties, he was going to college and working part-time.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The nineties were a period of political realignment in Texas. Jonathan Blitzer, The New Yorker, 10 Mar. 2025 The co-founder of the W3C Mobile Web Initiative in 2004 and head of new technologies at AOL who helped launch the AIM instant messenger client during the crazy internet era that was the nineties, Walsh claims to be one of the first people impersonated by hackers on the web. Davey Winder, Forbes, 10 Mar. 2025 Beyond the first-of-the-month purge, there are a few titles worth catching before they're scrapped, including Charlotte Wells' Aftersun, starring Paul Mescal and Frankie Corio, following a father and daughter on holiday in the late nineties. Ross Rosenfeld, Newsweek, 26 Feb. 2025 And the vibe is not complete without jazz or a nineties playlist. Akili King, Essence, 17 Feb. 2025 See All Example Sentences for ninety

Word History

Etymology

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 the 12th century, in the meaning defined at sense 1

Time Traveler
The first known use of ninety was before the 12th century

Cite this Entry

“Ninety.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ninety. Accessed 22 Mar. 2025.

Kids Definition

ninety

noun
nine·​ty ˈnīnt-ē How to pronounce ninety (audio)
plural nineties
1
: a number equal to nine times 10 see number
2
plural : the numbers 90 to 99 and specifically the years 90 to 99 in a lifetime or century
ninetieth adjective or noun
ninety adjective or pronoun

More from Merriam-Webster on ninety

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