- 1 jettison something to throw something out of a moving plane or ship to make it lighter to jettison fuel
- 2 jettison something/somebody to get rid of something or someone that you no longer need or want synonym discard He was jettisoned as team coach after the defeat.
- 3 jettison something to reject an idea, belief, plan, etc. that you no longer think is useful or likely to be successful synonym abandon
NAmE//ˈdʒɛt̮əsn//, NAmE//ˈdʒɛt̮əzn//Verb Forms present simple I / you / we / they jettison
he / she / it jettisons
past simple jettisoned
-ing form jettisoning