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English definition of “anniversary”

anniversary

noun [C]     /ˌæn.ɪˈvɜː.sər.i/ US  /-ˈvɝː.sɚ-/
B1 the day on which an important event happened in a previous year: We always celebrate our wedding anniversary with dinner in an expensive restaurant. Tomorrow is the 30th anniversary of the revolution.Birthdays and anniversaries
(Definition of anniversary noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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