out·board 
(outbôrd′)
(outbôrd′)adj.
1. Nautical
a. Situated or positioned outside the hull of a vessel.
b. Being in a position that is away from the center line of the hull of a ship.
2. Situated or positioned toward or nearer the end of a wing of an aircraft.
n.
1. An outboard motor.
2. A boat with an outboard motor.
outboard′ adv.