Third-person singular simple present indicative form of snuff

(euphemistic, colloquial) to die.

Finely ground or pulverized tobacco intended for use by being sniffed or snorted into the nose.

To extinguish a candle or oil-lamp flame by covering the burning end of the wick until the flame is suffocated. / (obsolete) To trim the burnt part of a candle wick.

The burning part of a candle wick, or the black, burnt remains of a wick (which must be periodically removed). / (obsolete) Leavings in a glass after drinking; heeltaps. / (slang) A murder.

To inhale through the nose. / To turn up the nose and inhale air, as an expression of contempt; hence, to take offence.

Third-person singular simple present indicative form of snuff it

(film) A film that shows, or purports to show, the actual deliberate killing of one of the performers.

(slang) Adequate; of acceptable quality; satisfying an appropriate standard. / (chiefly Britain, dated, slang) Mentally alert, shrewd, savvy.

A dish for a snuffer (a candle-snuffer). / A dish for the snuff of the lamps of the Tabernacle.