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
- n. In law, the throwing overboard of goods or merchandise, especially for the purpose of easing a ship in time of danger or distress.
- To throw overboard, especially for the purpose of easing and saving a ship in time of danger.
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 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.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Anglo-Norman getteson, from Old French getaison (French: would be *jetaison like pendaison). Cognate to jetsam (Wiktionary)