- 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 of jettisonMiddle 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
transitive verbjet·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 of jettisonFrom 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.
- (uncountable) Collectively, items that have been or are about to be ejected from a boat or balloon.
- (countable) The action of jettisoning items.
(third-person singular simple present jettisons, present participle jettisoning, simple past and past participle jettisoned)