n.; pl. Jetties [ F. jetée a pier, a jetty, a causeway. See Jet a shooting forth, and cf. Jutty. ] [ 1913 Webster ] 1. (Arch.) A part of a building that jets or projects beyond the rest, and overhangs the wall below. [ 1913 Webster ] 2. A wharf or pier extending from the shore. [ 1913 Webster ] 3. (Hydraul. Engin.) A structure of wood or stone extended into the sea to influence the current or tide, or to protect a harbor; a mole; as, the Eads system of jetties at the mouth of the Mississippi River. [ 1913 Webster ]
Jetty head (Naut.), a projecting part at the end of a wharf; the front of a wharf whose side forms one of the cheeks of a dock. [ 1913 Webster ]
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