- The definition of jettison is to cast something aside, abandon it or throw it away.
When you cast aside your old interest in music and throw away your old instruments, this is an example of a situation where you jettison your love of music.
- a throwing overboard of goods to lighten a ship, airplane, etc. in an emergency
Origin: Middle English jetteson from Anglo-French getteson from Old French getaison, a throwing, jetsam from Classical Latin jactatio, a throwing from jactare, to throw: see jet
- to throw (goods) overboard
- to discard (something) as useless or a burden
Used by arrangement with John Wiley & Sons, Inc.
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.
- The act of discarding or casting overboard.
Origin: 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.