A ship built to transport liquid or gaseous cargo, such as oil or liquefied natural gas, in bulk. An oil tanker steamed through the strait on its way to the refinery.
A road, rail, or other land vehicle fitted with a large tank for carrying liquids or gases; a tanker truck or railcar. Firefighters called in a water tanker to battle the remote blaze.
A member of a military tank crew. The tanker was responsible for operating the main gun of the armored vehicle.
A military aircraft equipped to refuel other aircraft in flight. The KC-135 tanker topped up the fighters before they continued their mission.