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[jet-ee] /ˈdʒɛt i/
noun, plural jetties.
a pier or structure of stones, piles, or the like, projecting into the sea or other body of water to protect a harbor, deflect the current, etc.
a wharf or landing pier.
the piles or wooden structure protecting a pier.
Also, jutty. an overhang, as of an upper story beyond a lower.
verb (used with object), jettied, jettying.
to construct (part of a building) so that it projects beyond lower construction; jutty.
late Middle English
1375-1425; late Middle English get(t)ey < Old French jetee, literally, something thrown out, a projection, noun use of jetee, feminine past participle of jeter to throw; see jet1


[jet-ee] /ˈdʒɛt i/
made of jet.
resembling jet, especially in color; of a deep black.
1475-85; jet2 + -y1
Related forms
jettiness, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for jetty
  • Well you should see the fluctuating color of the jetty down here.
  • It offers powder white coral sands, a thatch-roofed jetty and clean bathing facilities.
  • The munitions exploded on the jetty and in the water near the ship.
  • But out across a rickety-looking wood plank jetty, there's a new beer hall that is attracting a different kind of customer.
  • Beaches, inlet entrances, and the nearby sea floor are still changing as a result of jetty construction over a century ago.
  • jetty rocks can be slippery from mist, rain, or spray.
  • Large waves can knock people off a jetty and send them crashing into the rocks.
  • Overall, this jetty is lighter in color than the basalt jetty, since it is comprised mainly of schist and gneiss.
  • Following jetty construction, the shoreline grew seaward rapidly.
  • This, and all areas immediately adjacent to the jetty are extremely dangerous and should be avoided.
British Dictionary definitions for jetty


noun (pl) -ties
a structure built from a shore out into the water to direct currents or protect a harbour
a landing pier; dock
Word Origin
C15: from Old French jetee projecting part, literally: something thrown out, from jeter to throw; see jet1


of or resembling jet, esp in colour or polish
Derived Forms
jettiness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for jetty

early 15c., from Old French jetee "a jetty, a projecting part of a building," also "a throw," noun use of fem. past participle of jeter "to throw" (see jet (v.)). Notion is of a structure "thrown out" past what surrounds it.

Online Etymology Dictionary, © 2010 Douglas Harper
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Encyclopedia Article for jetty

any of a variety of engineering structures connected with river, harbour, and coastal works designed to influence the current or tide or to protect a harbour or beach from waves (breakwater). The two principal kinds of jetties are those constructed at river mouths and other coastal entrances and those used for the berthing of ships in harbours and offshore where harbour facilities are not available. Jettylike structures may be built out at intervals from the banks of rivers where a wide channel must be narrowed to concentrate the current and thus help maintain a navigable channel. These structures-variously termed spurs, spur dikes, and groins-may also be projected from the concave side of a river to retard bank erosion.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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