v. i. - To show contempt by turning up the nose, or by a particular facial expression.
v. i. - To inssinuate contempt by a covert expression; to speak derisively.
v. i. - To show mirth awkwardly.
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.
v. t. - To treat with sneers; to affect or move by sneers.
n. - The act of sneering.
n. - A smile, grin, or contortion of the face, indicative of contempt; an indirect expression or insinuation of contempt.