Definition of outrigger

• n. - 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.
• n. - A projecting support for a rowlock, extended from the side of a boat.
• n. - A boat thus equipped.
• n. - A projecting contrivance at the side of a boat to prevent upsetting, as projecting spars with a log at the end.