We are celebrating our tenth anniversary today.
A wedding anniversary; the anniversary of the founding of Rome.
The six-month anniversary of their wedding.
Today is the fiftieth anniversary of the end of the war.
His six-month anniversary of quitting smoking.
An example of an anniversary is the day on which a person got married.
An example of an anniversary is 9/11 after the bombing in New York.
Origin of anniversary
From American Heritage Dictionary of the English Language, 5th Edition
- From the Latin adjective anniversarius (“returning yearly”), from vertere (“to turn”), + annus (“year”).