OPERATION Meaning of OPERATION in English operation BrE AmE ˌɒp ə ˈreɪʃ ə n AmE \ ˌɑːp-▷ operation|s z▶ ˌ ope ˈ rations re ˌ search, - ˌ research BrE AmE▶ ope ˈ rations room BrE AmE Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012