Outrigger

Part of speech: noun (n.)

1. Any spar or projecting timber run out for temporary use, as from a ship's mast, to hold a rope or a sail extended, or from a building, to support hoisting teckle.

2. A projecting support for a rowlock, extended from the side of a boat.

3. A boat thus equipped.

4. A projecting contrivance at the side of a boat to prevent upsetting, as projecting spars with a log at the end.