·adj Made of jet, or like jet in color.
II. Jetty ·noun A wharf or pier extending from the shore.
III. Jetty ·vi To jut out; to Project.
IV. Jetty ·noun A part of a building that jets or projects beyond the rest, and overhangs the wall below.
V. Jetty ·noun 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.