any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another)
a large (usually metallic) vessel for holding gases or liquids
a cell for violent prisoners
an enclosed armored military vehicle; has a cannon and moves on caterpillar treads
a freight car that transports liquids or gases in bulk
as much as a tank will hold
consume excessive amounts of alcohol
store in a tank by causing (something) to flow into it
treat in a tank