(1):

(n.) The act of snorting; the sound produced in snorting.

(2):

(v. t.) To expel throught the nostrils with a snort; to utter with a snort.

(3):

(v. i.) To snore.

(4):

(v. i.) To laugh out loudly.

(5):

(v. i.) To force the air with violence through the nose, so as to make a noise, as do high-spirited horsed in prancing and play.