Meaning of “blow (sth) out” - Learner’s Dictionary

blow (sth) out

phrasal verb with blow uk us /bləʊ/ verb (past tense blew, past participle blown)

B1 If a flame blows out, or if you blow it out, it stops burning because you or the wind have blown it:

Emma blew out the candle.

(Definition of “blow (sth) out” from the Cambridge Learner’s Dictionary © Cambridge University Press)