Main Entry:

an·ni·ver·sa·ry

Pronunciation:

\ˌa-nə-ˈvərs-rē, -ˈvər-sə-\

Function:

noun

Inflected Form(s):

plural an·ni·ver·sa·ries

Etymology:

Middle English anniversarie, from Medieval Latin anniversarium, from Latin, neuter of anniversarius returning annually, from annus year + versus, past participle of vertere to turn — more at annual, worth

Date:

13th century

1: the annual recurrence of a date marking a notable event ; broadly : a date that follows such an event by a specified period of time measured in units other than years <the 6-month anniversary of the accident>2: the celebration of an anniversary