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

 

jetty

 noun
noun
BrE BrE//ˈdʒeti//
 
; NAmE NAmE//ˈdʒeti//
 
(pl. jetties)(North American English also dock) Coastlines and the sea, Travelling by boat or ship
 
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a wall or platform built out into the sea, a river, etc., where boats can be tied and where people can get on and off boats See related entries: Coastlines and the sea, Travelling by boat or ship Word Origin late Middle English: from Old French jetee, feminine past participle of jeter ‘to throw’, based on Latin jactare, frequentative of jacere ‘to throw’.
See the Oxford Advanced American Dictionary entry: jetty