outboard

adjective

1. located on the exterior of a hull or aircraft.
2. located farther from the center, as of an aircraft: the outboard end of a wing.
3. (of a motorboat) having an outboard motor.

adverb

4. outside or away from the center of a hull, aircraft, machine, etc.: The sail swung outboard.Compare inboard.

noun

5. an outboard motor.
6. a boat equipped with an outboard motor.

adjective

1. (of a boat’s engine) portable, with its own propeller, and designed to be attached externally to the sternCompare inboard (def. 1)
2. in a position away from, or further away from, the centre line of a vessel or aircraft, esp outside the hull or fuselage

adverb

3. away from the centre line of a vessel or aircraft, esp outside the hull or fuselage

noun

4. an outboard motor
5. a boat fitted with an outboard motor

adj.“situated on the outside of a ship,” 1823, from out + board (n.2). In reference to motors, from 1909.