from The American Heritage® Dictionary of the English Language, 4th Edition

  • transitive v. To cast overboard or off: a ship jettisoning wastes; a pilot jettisoning aircraft fuel.
  • transitive v. Informal To discard (something) as unwanted or burdensome: jettisoned the whole marketing plan.
  • n. The act of discarding or casting overboard.
  • n. Jetsam.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Collectively, items that have been or are about to be ejected from a boat or balloon.
  • n. The action of jettisoning items.
  • v. To eject from a boat, submarine, aircraft, spaceship or hot-air balloon, so as to lighten the load.
  • v. To let go or get rid of as being useless or defective; discard.

from the GNU version of the Collaborative International Dictionary of English

  • n. The throwing overboard of goods from necessity, in order to lighten a vessel in danger of wreck.
  • n. See Jetsam, 1.

from The Century Dictionary and Cyclopedia

  • To throw overboard, especially for the purpose of easing and saving a ship in time of danger.
  • n. In law, the throwing overboard of goods or merchandise, especially for the purpose of easing a ship in time of danger or distress.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. throw as from an airplane
  • v. throw away, of something encumbering


from The American Heritage® Dictionary of the English Language, 4th Edition

From Middle English jetteson, a throwing overboard of goods to lighten ship, from Anglo-Norman getteson, from Vulgar Latin *iectātiō, iectātiōn-, from *iectātus, past participle of *iectāre, to throw; see jet2.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Anglo-Norman getteson, from Old French getaison (French: would be *jetaison like pendaison). Cognate to jetsam


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