1.
To snuff out something such as a disagreement means to stop it, usually in a forceful or sudden way.
Every time a new flicker of resistance appeared, the government snuffed it out...
The recent rebound in mortgage rates could snuff out the housing recovery.
PHRASAL VERB : V n P , V P n (not pron)
2.
If you snuff out a small flame, you stop it burning, usually by using your fingers or by covering it with something for a few seconds.
Tenzin snuffed out the candle.
PHRASAL VERB : V P n (not pron) , also V n P