Definition of jetty

< jettison

jetty >

jet·ty¹    (jt) KEY 

NOUN:
pl. jet·ties

1. A structure, such as a pier, that projects into a body of water to influence the current or tide or to protect a harbor or shoreline from storms or erosion.
2. A wharf.

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ETYMOLOGY:
Middle English getti, jettie, from Old French jetee, from feminine past participle of jeter, to project, throw ; see jet²