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Added 9 October 2026

anniversary

/ˌænɪˈvɜːs(ə)ɹi/ noun

In Latin: natalis Wiktionary

noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about anniversary at Wordnik → Where our words come from →

A day that is an exact number of years (to the day) since a given significant event occurred. Often preceded by an ordinal number indicating the number of years. .mw-parser-output .defdate{font-size:smaller}
Today is the fiftieth anniversary of the end of the war.
Such a day that commemorates a wedding.
We are celebrating our tenth anniversary today.
A day subsequent in time to a given event by some significant period other than a year .

adjective

Lasting for or completed in a year.
Synonym of yearly (“occurring once a year; recurring annually”).

verb

To mark, commemorate, or celebrate the anniversary of (something).
To mark, commemorate, or celebrate an anniversary, especially a wedding anniversary.
To pass the anniversary of (something), in the context of a company’s yearly financial report.

Origin

From Middle English anniversary, from Medieval Latin anniversāria (diēs), anniversārium, from anniversārius (“yearly”), from annus (“year”) + versus, past participle of vertere (“to turn”).

From Wiktionary, via Kaikki.org (CC BY-SA)

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