anniversary
Saya-ni-VUR-suh-ree/ˌænɪˈvɝs(ə)ɹi//ˌænɪˈvɜːs(ə)ɹi/
Pluralanniversaries
- 1A date that falls an exact number of years after an important event, such as a wedding; loosely, one marking another set period, such as six months.
The company held a banquet to mark the fiftieth anniversary of its founding.
Veterans gathered at the memorial on the anniversary of the battle.
UsageUsually the anniversary of something, with a number word to count the years: the fiftieth anniversary of the founding.
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Origin
Latin annus ('year') and versus, the past participle of vertere ('to turn'), together gave anniversārius, 'yearly'. Medieval Latin built anniversāria (diēs) on it, and Middle English took that over as anniversary.