[ jet-uh-suh n, -zuh n ]
/ ˈdʒɛt ə sən, -zən /

verb (used with object)

to cast (goods) overboard in order to lighten a vessel or aircraft or to improve its stability in an emergency.
to throw off (something) as an obstacle or burden; discard.
Cards. to discard (an unwanted card or cards).


the act of casting goods from a vessel or aircraft to lighten or stabilize it.

Words nearby jettison

Origin of jettison

1375–1425; late Middle English jetteson < Anglo-French; Old French getaisonLatin jactātiōn- (stem of jactātiō) jactation


jet·ti·son·a·ble, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for jettisonable

/ (ˈdʒɛtɪsən, -zən) /

verb -sons, -soning or -soned (tr)

to throw away; abandonto jettison old clothes
to throw overboard


another word for jetsam (def. 1)

Word Origin for jettison

C15: from Old French getaison, ultimately from Latin jactātiō a tossing about; see jactation
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012