a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away
"The old stone jetty stretched out into the sea, successfully keeping the sand on our family's beach from being washed away during every storm."
A structure of wood or stone extended into the sea to influence the current or tide, or to protect a harbor or beach.
"The old wooden jetty broke in half during the storm, leaving the small boats exposed to the rough waves without any protection."
To jut out; to project.
"The old wooden pier juts out into the water, creating a small break for the fishing boats."
Made of jet, or like jet in color.
"The old wooden pier looked as black and glossy as a piece of fine jet after the rain soaked it."