tank

Universal Words noun 1 a large container for holding liquid or gas: a hot water tank * a fuel / petrol / fish tank seealsoSEPTICTANK, THINKTANK 2 (also tankful ) 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.