(1):

(n.) The act of sneering.

(2):

(v. t.) To utter with a grimace or contemptuous expression; to utter with a sneer; to say sneeringly; as, to sneer fulsome lies at a person.

(3):

(v. t.) To treat with sneers; to affect or move by sneers.

(4):

(v. i.) To show contempt by turning up the nose, or by a particular facial expression.

(5):

(v. i.) To inssinuate contempt by a covert expression; to speak derisively.

(6):

(n.) A smile, grin, or contortion of the face, indicative of contempt; an indirect expression or insinuation of contempt.

(7):

(v. i.) To show mirth awkwardly.