sneer UK /snɪə̯/US /snɪɚ̯/noun 2verb 2forms 5 noun2 •A facial expression where one slightly raises one corner of the upper lip, generally indicating scorn.Near them, on the sand, / Half sunk, a shattered visage lies, whose frown, / And wrinked lip, and sneer of cold command, / Tell that its sculptor well those passions read — 1817 •A display of contempt; scorn. verb2 •To raise a corner of the upper lip slightly, especially in scorn. •To utter with a grimace or contemptuous expression; to say sneeringly.to sneer fulsome lies at a person formssneered · sneering · sneereth · sneers · sneerest