- An open container or pool for storing water or other liquids.
- The amount held by a container; a tankful.
"I burned three tanks of gas on the drive to New York."
- (Southwestern US, chiefly Texas) A large metal container, usually placed near a wind-driven water pump, in an animal pen or field.
- (role-playing games, board games, video games) a unit or character designed primarily around damage absorption and holding the attention of the enemy (as opposed to dealing damage, healing, or other tasks)
- A Bombay weight of 72 grains, for pearls.
- A closed container for liquids or gases.
- The fuel reservoir of a vehicle.
- (Australian and Indian English) A reservoir or dam.
- (slang) A very muscular and physically imposing person. Somebody who is built like a tank.
- A small Indian dry measure, averaging 240 grains in weight.
- A pond, pool, or small lake, natural or artificial.
- An armoured fighting vehicle, armed with a gun in a turret, and moving on caterpillar tracks.
- (Southwestern US, chiefly Texas) By extension a small pond for the same purpose.
- To fail or fall (often used in describing the economy or the stock market); to degenerate or decline rapidly; to plummet.
- To deliberately lose a sports match with the intent of gaining a perceived future competitive advantage.
- To put fuel into a tank
- (video games) To attract the attacks of an enemy target in cooperative team-based combat, so that one's teammates can defeat the enemy in question more efficiently.