Anniversary
WordNet
noun
(1) The date on which an event occurred in some previous year (or the celebration of it)
WiktionaryText
Etymology
From the Latin adjective anniversarius, "returning yearly", from vertere, "to turn", + annus, "year".
Noun
- Of a significant event, a day that is an exact number of years (to the day) since the event occurred. Often preceded by an ordinal number indicating the number of years that have elapsed since the event.
- Today is the fiftieth anniversary of the end of the war.
- Such, where the event is a wedding.
- We are celebrating our tenth anniversary today.