GO OFF Meaning of GO OFF in English 1》 (of a gun or bomb) explode or fire. ↘(of an alarm) begin to sound. 2》 Brit. (of food) begin to decompose. 3》 Brit. informal begin to dislike. 4》 go to sleep. → go Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004