Definition of jetsam noun from the Oxford Advanced Learner's Dictionary

 

jetsam

 noun
noun
BrE BrE//ˈdʒetsəm//
 
; NAmE NAmE//ˈdʒetsəm//
 
Coastlines and the sea, Travelling by boat or ship
 
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things that are thrown away, especially from a ship at sea and that float towards land compare flotsam See related entries: Coastlines and the sea, Travelling by boat or ship Word Origin late 16th cent. (as jetson): contraction of jettison.
See the Oxford Advanced American Dictionary entry: jetsam