Pronunciation (UK) IPA (key): /ˌænɪˈvɜːs(ə)ri/ (US) IPA (key): /ˌænɪˈvɝs(ə)ri/ or /ˌænəˈvɝs(ə)ri/ Audio (UK)(file) Audio (US)(file) Noun Singular anniversary Plural anniversaries (countable) An anniversary is a day that is an exact number of years since a special event. Today is our tenth wedding anniversary. Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads