AskDefine | Define jettison

Dictionary Definition



1 throw away, of something encumbering
2 throw as from an airplane

User Contributed Dictionary



  • italbrac Australian English /ˈdʒɛɾəsən/ or /ˈdʒɛtɪsən/
  • italbrac RP /ˈdʒɛtɪsən/
  • italbrac US /ˈdʒɛtɪsən/ or /ˈdʒɛtəsən/


From getteson, from getaison (French: would be jetaison like pendaison).


  1. Collectively, items that have been or are about to be ejected from a boat or balloon.
  2. The action of jettisoning items.



  1. To eject from a boat, submarine, aircraft, or hot-air balloon, so as to lighten the load.
    The ballooners had to jettison all of their sand bags to make it over the final hill.
  2. To let go or get rid of as being useless or defective; discard.



to eject from a boat
to let go or get rid of
  • Spanish: desechar, expeler

Extensive Definition

Jettison may refer to:

Synonyms, Antonyms and Related Words

abandon, abandonment, abdicate, absentation, back out, beg off, boot out, booting out, bounce, cashier, cast, cast aside, cast away, cast off, cast out, castaway, casting away, castoff, cessation, chuck, chuck out, cry off, deep six, deep-six, defenestrate, defenestration, depart from, desuetude, detrude, detrusion, discard, discarding, discharge, disposal, dispose of, disposition, disuse, ditch, drop out, dump, dumping, eighty-six, eject, ejection, ejectment, eliminate, elimination, evacuate, evacuation, exclude, expel, expulsion, extrude, extrusion, forsake, forsaking, get quit of, get rid of, get shut of, give away, give the hook, go back on, heave out, jettisoning, jilt, junk, junking, kick downstairs, kick out, kicking downstairs, leave, leave behind, leave flat, leaving, maroon, obtrude, obtrusion, oust, ouster, ousting, part with, pull out, pulling out, put out, quit, quit cold, refuse, reject, rejectamenta, rejection, relegation, removal, remove, renege, riddance, say goodbye to, scrap, scrapping, shed, slough, stand down, take leave of, the boot, the bounce, throw away, throw out, throw over, throw overboard, throwaway, throwing out, throwing overboard, thrust out, toss out, toss overboard, turn out, vacate, withdraw, withdrawal
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