[uh-bawrd, uh-bohrd]


on board; on, in, or into a ship, train, airplane, bus, etc.: to step aboard.
alongside; to the side.
Baseball. on base: a homer with two aboard.
into a group as a new member: The office manager welcomed him aboard.


on board of; on, in, or into: to come aboard a ship.

Nearby words

  1. abnormally,
  2. abnormity,
  3. abo,
  4. abo hemolytic disease of newborn,
  5. abo system,
  6. aboardage,
  7. abode,
  8. abohm,
  9. aboideau,
  10. aboil


    all aboard! (as a warning to passengers entering or planning to enter a train, bus, boat, etc., just before starting) Everyone get on!

Origin of aboard

1350–1400; Middle English abord(e) (see a-1, board), perhaps conflated with Middle French a bord

Can be confusedaboard abort abroad

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for aboard

British Dictionary definitions for aboard


adverb, adjective, preposition (postpositive)

on, in, onto, or into (a ship, train, aircraft, etc)
nautical alongside (a vessel)
all aboard! a warning to passengers to board a vehicle, ship, 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

Word Origin and History for aboard



late 14c., probably in most cases from Old French à bord, from à "on" + bord "board," from Frankish *bord or a similar Germanic source (see board (n.2)); the "boarding" or sides of a vessel extended to the ship itself. The usual Middle English expression was within shippes borde. The call all aboard! as a warning to passengers is attested from 1838.

Online Etymology Dictionary, © 2010 Douglas Harper