What is the meaning of Jetty?

A part of a building that jets or projects beyond the rest; specifically, an upper storey which overhangs the part of the building below.

2. A structure of stone or wood which extends into a river or sea to protect a bank, beach, harbour, etc., from currents or tides; a breakwater.

   A structure of stone or wood which extends into a river or sea to protect a bank, beach, harbour, etc., from currents or tides; a breakwater.

   A dock or wharf extending into a river from a bank, or into a sea from a shore, for boats to land or moor at; a pier.

   A natural piece of land projecting into a body of water; a peninsula, a promontory.

   In full air jetty: synonym of jet bridge (“an elevated, usually enclosed, corridor connecting an airport to an aeroplane for embarking and disembarking crew and passengers”).

   Synonym of bulwark (“a defensive rampart or wall”).

   1. Sometimes followed by out: to construct (a part of a building) so that it jets or projects beyond the rest.
   2. To provide (a riverbank, seashore, etc.) with a jetty (“breakwater; dock or wharf”) (noun sense 2.1 or sense 2.2).

   Sometimes followed by out: to construct (a part of a building) so that it jets or projects beyond the rest.

   To provide (a riverbank, seashore, etc.) with a jetty (“breakwater; dock or wharf”) (noun sense 2.1 or sense 2.2).

   1. Sometimes followed by out or over: of (a part of) a building: to jet or project beyond the rest of the building or other structures.

      Sometimes followed by out or over: of (a part of) a building: to jet or project beyond the rest of the building or other structures.

      To provide a riverbank, seashore, etc., with a jetty (noun sense 2.1 or sense 2.2).

      Having the characteristic of jetting or jutting out; protruding.

      Like jet (“a hard, black form of coal”) in colour; jet-black, pitch-black.

      Having a composition like that of jet.

      To move with haste.

      Source: wiktionary.org