to stop the mouth of, by thrusting sometimes in, so as to hinder speaking; hence, to silence by authority or by violence; not to allow freedom of speech to.-to pry or hold open by means of a gag.-to cause to heave with nausea.-to heave with nausea; to retch.-to introduce gags or interpolations. see gag, n., 3.-something thrust into the mouth or throat to hinder speaking.-a mouthful that makes one retch; a choking bit; as, a gag of mutton fat.-a speech or phrase interpolated offhand by an actor on the stage in his part as written, usually consisting of some seasonable or local allusion.