Dictionary 1. (n.) One who clacks; that which clacks; especially, the clapper of a mill.2. (n.) A claqueur. See Claqueur. Thesaurus Klaxon boiler factory boiler room bull-roarer catcall cherry bomb clack clapper cracker cricket firecracker horn noisemaker rattle rattlebox siren snapper steam whistle ticktack whistle whizgig whizzer |