Definition of gaff

• n. - A barbed spear or a hook with a handle, used by fishermen in securing heavy fish.
• n. - The spar upon which the upper edge of a fore-and-aft sail is extended.
• n. - Same as Gaffle, 1.
• v. t. - To strike with a gaff or barbed spear; to secure by means of a gaff; as, to gaff a salmon.