Anniversary
/ˌænəˈvɜrsəri/
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Definition
(noun) 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.
Sentence Examples
We celebrated the centenary anniversary day.
We held a party in honor of the 20th anniversary of our company.
CEFR Practice Quiz
The couple celebrated their fiftieth wedding ____ with a big party.