Longman Dictionary of Contemporary English homepage

Topic: TECHNOLOGY

Date: 1600-1700
Language: Portuguese
Origin: tanque 'pool'

tank

1 noun
     
tank
tank1 S2 W2 [countable]
1DT a large container for storing liquid or gas:
The water tank is leaking.
Somehow the chemical got from a storage tank into water supplies.
fish/marine/breeding tank (=for keeping or breeding fish in)
the plane's fuel tank
petrol tank British English gas tank American English
2 also tankful the amount of liquid or gas held in a tank:
We set off next day on a full tank.
tank of
a tankful of petrol
tank
3PMW a heavy military vehicle that has a large gun and runs on two metal belts fitted over its wheels
4DT a large artificial pool for storing water
5

in the tank

American English informal failing and losing money
be/go in the tank
Sales can't keep going up, but that doesn't mean the industry is going in the tank.
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