ninety

play
noun nine·ty \ˈnīn-tē\

Definition of ninety

plural

nineties

  1. 1 :  a number equal to nine times 10 — see number table

  2. 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

play \ˈnīn-tē-əth\ adjective or noun

ninety

adjective

ninety

pronoun, plural in construction

Examples of ninety in a Sentence

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

Recent Examples of ninety from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ninety'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology 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



NINETY Defined for English Language Learners

ninety

play
noun

Definition of ninety for English Language Learners

  • : the number 90

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

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


NINETY Defined for Kids

1

ninety

play
adjective nine·ty \ˈnīn-tē\

Definition of ninety for Students

  1. :  being nine times ten


2

ninety

play
noun nine·ty

Definition of ninety for Students

  1. :  nine times ten :  90


Learn More about ninety


Seen and Heard

What made you want to look up ninety? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

the point at which something begins

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • istock-refers-to-this-as-a-tumble-of-strawberries-which-sounded-pretty-nice-to-us
  • Which is a synonym of garner?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!