from
The Collaborative International Dictionary of English v.0.48
outrigger \out"rig`ger\, 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.
[1913 Webster]
2. (Naut.)
(a) A projecting support for a rowlock, extended from the
side of a boat.
(b) A boat thus equipped.
(c) A projecting contrivance at the side of a boat to
prevent upsetting, as projecting spars with a log at
the end; also used attributively, as an outrigger
canoe.
[1913 Webster +PJC]
3. (Aeronautics) A projecting frame used to support the
elevator or tail planes, etc.
[Webster 1913 Suppl.]