Gag  —n. 1 thing thrust into or tied across the mouth, esp. To prevent speaking or crying out. 2 joke or comic scene. 3 parliamentary closure. 4 thing restricting free speech. —v. (-gg-) 1 apply a gag to. 2 silence; deprive of free speech. 3 choke, retch. 4 make gags as a comedian etc. [origin uncertain]