Definition of “let sth off” - English Dictionary

british dictionary

“let sth off” in British English

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let sth off

phrasal verb with let uk /let/ us /let/ verb present participle letting, past tense and past participle let

to fire a gun, or to make something such as a bomb or fireworks explode:

Don't let off fireworks near the house.

(Definition of “let sth off” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)