Tank, n. [Pg. tanque, L. stangum a pool; or perhaps of East Indian origin. Cf. Stank, n.] A large basin or cistern; an artificial receptacle for liquids.
Tank engine, a locomotive which carries the water and fuel it requires, thus dispensing with a tender. — Tank iron, plate iron thinner than boiler plate, and thicker than sheet iron or stovepipe iron. — Tank worm(Zoöl.), a small nematoid worm found in the water tanks of India, supposed by some to be the young of the Guinea worm.