n. A sharp, strong iron hook, like a large fish-hook without a barb, inserted into or otherwise attached to a wooden handle of convenient length, used especially for landing large fish, as salmon, pike, bass, or the like, after they have been hooked on the line. Also called gaffhook.n. Nautical, a spar used to extend the upper edge of fore-and-aft sails which are not set on stays, as the mainsail of a sloop or the spanker of a ship.n. The metal spur bound to the shanks of fighting-cocks; a gaffle.—To hook with a gaff; land by means of a gaff: as, to gaff a fish.To use the gaff: as, to gaff for an angler.n. In Great, Britain, a theater of the lowest class, the admission to which is generally a penny; a cheap and loosely conducted place of amusement, where singing and dancing take place.n. Short for gaffer.n. Used in the following phrase.