Chās'er, n.
n. 1. One who chases; a pursuer; a driver; a hunter.
Sense 2. (Naut.) A gun at the head and stern of a vessel, for firing when in chase. Brande.
Sense 3. An enchaser. See ENCHASE.
Sense 4. (Mech.) A hand tool of steel, with notches corresponding to the threads of a screw, used for cutting or finishing screw-threads, either external or internal, on work revolving in a lathe.