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on board definition


This page has 5 definitions of on board in English. On board is an adjective and interjection. Examples of how to use on board in a sentence are shown. Also define these 0 related words and terms: .

See also: onboard and on-board


Sailors on board the USS O'Kane.



on board (not comparable)

  1. On or in a means of transportation.
    Baby on board
    Even when I am on board the plane, I can never feel secure that my luggage is, too.
    • 1915, G[eorge] A. Birmingham [pseudonym; James Owen Hannay], chapter I, in Gossamer, New York, N.Y.: George H. Doran Company, →OCLC:
      There is an hour or two, after the passengers have embarked, which is disquieting and fussy. Mail bags, so I understand, are being put on board. Stewards, carrying cabin trunks, swarm in the corridors. Passengers wander restlessly about or hurry, with futile energy, from place to place.
  2. (idiomatic) Joining in or participating.
    Is that new teammate properly on board yet?
  3. (idiomatic) Agreeing or supporting.
    It's a good idea, but let's see if we can get a few more of the management team on board.
    Without management on board, the project has little chance of success.
    • 2021 February 17, Drachinifel, 20:52 from the start, in German Merchant Raiders of WW2 - Gentleman Raiders of the High Seas[1], archived from the original on 4 December 2022:
      The ships' successes made Hitler quite the fan of them, and he supported the idea of more being converted and sent out soon. And so, with the Führer on board, albeit not literally, another six vessels were rapidly placed under conversion.
  4. (idiomatic) Into itself or oneself.
    • 1991, David R. Lamb, Melvin H. Williams, Ergogenics: Enhancement of Performance in Exercise and Sport:
      Soccer players certainly tend not to take fluids on board.


Derived terms



on board!

  1. The stereotypical cry of pirates when boarding a ship for close quarters combat.