Definition of jubilee noun from the Oxford Advanced Learner's Dictionary

 

jubilee

 noun
noun
BrE BrE//ˈdʒuːbɪliː//
 
; NAmE NAmE//ˈdʒuːbɪliː//
 
 
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a special anniversary of an event, especially one that took place 25 or 50 years ago; the celebrations connected with it see also diamond jubilee, golden jubilee, silver jubilee Wordfinderanniversary, birthday, celebrate, commemorate, festivity, jubilee, occasion, parade, party, reception Word Origin late Middle English: from Old French jubile, from late Latin jubilaeus (annus) ‘(year) of jubilee’, based on Hebrew yōb̲ēl, originally ‘ram's-horn trumpet’, with which the jubilee year was proclaimed.
See the Oxford Advanced American Dictionary entry: jubilee