1. （固定在桅杆上以支撑帆的）斜桁
On a boat, a gaff is a pole which is attached to a mast in order to support a particular kind of sail.

2. （钓大鱼的）手钩，挽钩
A gaff is a pole with a point or hook at one end, which is used for catching large fish.

3. see also: gaffe

1. an iron hook with a handle
used for landing large fish

2. a spar rising aft from a mast to support the head of a quadrilateral fore-and-aft sail

3. a sharp metal spike or spur that is fastened to the leg of a gamecock