n.
Pronunciation: ˌ a-n ə - ' v ə rs-r ē , - ' v ə r-s ə -
Function: noun
Inflected Form: plural -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