A large container for storing liquid or gas. The water tank on the roof holds 500 gallons.
A heavily armored combat vehicle that moves on tracks and is equipped with a large cannon. The army deployed several tanks to the battlefield.
A large, enclosed container for keeping fish or other aquatic animals. She has a beautiful saltwater tank filled with colorful fish.
A sleeveless, close-fitting shirt; a tank top. He worked out at the gym in a plain black tank.
A very strong, heavily built person or athlete (slang). At 6'4" and 250 pounds, the linebacker is a total tank on the field.