An·ni·ver·sa·ry, n.; pl. Anniversaries
1. The annual return of the day on which any notable event took place, or is wont to be celebrated; as, the anniversary of the Declaration of Independence.
2. R. C. Ch. The day on which Mass is said yearly for the soul of a deceased person; the commemoration of some sacred event, as the dedication of a church or the consecration of a pope.
3. The celebration which takes place on an anniversary day.