[jet-uh-suhn, -zuhn]
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.

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

jettisonable, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
jettison (ˈdʒɛtɪsən, -zən)
vb , -sons, -soning, -soned
1.  to throw away; abandon: to jettison old clothes
2.  to throw overboard
3.  another word for jetsam
[C15: from Old French getaison, ultimately from Latin jactātiō a tossing about; see jactation]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1425 (n.) "act of throwing overboard," from Anglo-Fr. getteson, from O.Fr. getaison "act of throwing (goods overboard)," especially to lighten a ship in distress, from L.L. jactionem (nom. jactatio), from jactatus, pp. of jectare "toss about" (see jet (v.)). The verb is first attested 1848.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
But the team also continued to jettison other veterans, releasing strong.
And you have to learn to accept that critique, incorporate the good and
  jettison the bad.
In effect, the state will take on much of the debt that the private sector has
  decided to jettison.
We program each tag to jettison from the whale at a predetermined time, after
  which it floats to the surface.
Related Words
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