[ an-uh-vur-suh-ree ]
/ ˌæn əˈvɜr sə ri /
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See synonyms for: anniversary / anniversaries on Thesaurus.com

noun, plural an·ni·ver·sa·ries.
the yearly recurrence of the date of a past event: the tenth anniversary of their marriage.
the celebration or commemoration of such a date.
returning or recurring each year; annual.
pertaining to an anniversary: an anniversary gift.Abbreviation: anniv.
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Origin of anniversary

1200–50; Middle English anniversarie (<Anglo-French ) <Medieval Latin (diēs) anniversāria anniversary (day), Latin anniversārius recurring yearly, equivalent to anni- (combining form of annus year) + vers(us) turned, past participle of vertere (vert- turn + -tus past participle suffix) + -ārius-ary
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use anniversary in a sentence

British Dictionary definitions for anniversary

/ (ˌænɪˈvɜːsərɪ) /

noun plural -ries
the date on which an event occurred in some previous yeara wedding anniversary
the celebration of this
of or relating to an anniversary
recurring every year, esp on the same date

Word Origin for anniversary

C13: from Latin anniversārius returning every year, from annus year + vertere to turn
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012