Definition of ninety
- She's in her nineties.
During the nineties, he was going to college and working part-time.
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.
: the number 90
nine*ties : the numbers ranging from 90 to 99
: a set of years ending in digits ranging from 90 to 99
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