[in-bawrd, -bohrd]


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


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


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

Origin of inboard

First recorded in 1840–50; orig. phrase in board Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for inboard

Historical Examples of inboard

  • With great exertions, however, the spars and sails were saved, and got inboard.

    Sunshine Bill

    W H G Kingston

  • Around and around they flew, all inboard guns trained on the enemy.

  • At last Lambert got his friend on the edge, and tumbled him inboard.

    The Red Man's Revenge

    R.M. Ballantyne

  • If you only get the right sort, it is good for everything, inboard and outboard.

    Skipper Worse

    Alexander Lange Kielland

  • It was a lot worse when the boys reached me in the boat an hauled me inboard.

    Carolyn of the Corners

    Ruth Belmore Endicott

British Dictionary definitions for inboard



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


towards the centre line of or within a vessel, aircraft, etc
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012