- 1 a large container for holding liquid or gas a hot water tank a fuel tank a fish tank (= for keeping fish in) see also septic tank, think tank See related entries: The power industry, Diving, Parts of a car
(also tankful BrE BrE//ˈtæŋkfʊl//; NAmE NAmE//ˈtæŋkfʊl//) the contents of a tank or the amount it will hold We drove there and back on one tank of petrol.
- 3 a military vehicle covered with strong metal and armed with guns. It can travel over very rough ground using wheels that move inside metal belts.
- 4(Indian English) an artificial pool, lake or reservoir Word Originearly 17th cent.: perhaps from Gujarati tānkũ or Marathi (a language spoken in the western Indian state of Maharashtra) tānke͂ ‘underground cistern’, from Sanskrit tadāga ‘pond’, probably influenced by Portuguese tangue ‘pond’, from Latin stagnum. The military vehicle took its name from the use of tank as a secret code word during manufacture in 1915.Extra examples Put a little fish food into the tank. Tanks rolled in to end the siege. The truck crashed into a wall and ruptured a fuel tank. a full tank of gasoline/gas a water storage tank the hot and cold water tanks Firefighters sometimes need to use air tanks and special breathing masks. Water from the boiler is pumped into the hot water tank. a fuel/petrol/fish tank