Laugh  —v. 1 make the sounds and movements usual in expressing lively amusement, scorn, etc. 2 express by laughing. 3 (foll. By at) ridicule, make fun of. —n. 1 sound, act, or manner of laughing. 2 colloq. Comical thing.  laugh off get rid of (embarrassment or humiliation) by joking. Laugh up one's sleeve laugh secretly. [old english]