Definition of jettison

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< jet stream

jetty >

jet·ti·son

-s

n, -z

n) KEY

TRANSITIVE VERB:
jet·ti·soned , jet·ti·son·ing , jet·ti·sons

To cast overboard or off: a ship jettisoning wastes; a pilot jettisoning aircraft fuel.
Informal To discard (something) as unwanted or burdensome: jettisoned the whole marketing plan.

NOUN:

The act of discarding or casting overboard.
Jetsam.

ETYMOLOGY:
From Middle English jetteson, a throwing overboard of goods to lighten ship, from Anglo-Norman getteson, from Vulgar Latin *iectti , iecttin-, from *iecttus, past participle of *iectre, to throw ; see jet ²

Thesaurus: synonyms for jettison

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The American Heritage® Dictionary of the English Language, Fourth Edition.
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