jetty Noun A part of a building that jets or projects beyond the rest, and overhangs the wall below.
jetty Noun A wharf or pier extending from the shore.
jetty Noun (Hydraulic engineering): 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.
jetty Verb To jut out; to project.
jetty Adjective Made of jet, or like jet in color.