tank - definition and synonyms

noun [countable] 

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  1. 1
    a large metal container for liquid or gas

    a water/oil/fuel tank

    1. a.
      the liquid or gas in a tank, or the amount that a tank contains

      We made it to York on a single tank of petrol.

  2. 2
    a very strong military vehicle with a large gun on the top and wheels that have metal bands called tracks around them
    1. a.
      [only before noun] belonging to or connected with a military tank
  3. 3
    American informal a room in a police station where prisoners are kept
  4. 4
    Indian English an artificial lake used for supplying people with water through a system of pipes
     Synonyms and related words