Tank n.
 1. A large basin or cistern; an artificial receptacle for liquids.
 2. A pond, pool, or small lake, natural or artificial.
    We stood in the afterglow on the bank of the tank and saw the ducks come home.    --F. Remington.
    The tanks are full and the grass is high.    --Lawson.
 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 Zool., a small nematoid worm found in the water tanks of India, supposed by some to be the young of the Guinea worm.
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