inboard

adjective

1. located nearer the longitudinal axis or center, as of an airplane: the inboard section of a wing.
2. located inside a hull or aircraft: a motorboat with an inboard engine.
3. (of a motorboat) having the motor inboard.

adverb

4. inside or toward the longitudinal axis or center of a hull, aircraft, machine, etc.Compare outboard(def 4).

noun

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

adjective

1. (esp of a boat’s motor or engine) situated within the hullCompare outboard (def. 1)
2. situated between the wing tip of an aircraft and its fuselagean inboard engine

adverb

3. towards the centre line of or within a vessel, aircraft, etc