Meaning of “snuff sth out” - Learner’s Dictionary

snuff sth out

phrasal verb with snuff us uk /snʌf/ verb
END informal

to suddenly end something:

England's chances were snuffed out by three brilliant goals from the Italians.

to stop a candle flame from burning by covering it or pressing it with your fingers

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