a wind instrument of music, consisting of a tube or tubes of straw, reed, wood, or metal; any tube which produces musical sounds; as, a shepherd's pipe; the pipe of an organ.-any long tube or hollow body of wood, metal, earthenware, or the like: especially, one used as a conductor of water, steam, gas, etc.-a small bowl with a hollow steam, -- used in smoking tobacco, and, sometimes, other substances.-a passageway for the air in speaking and breathing; the windpipe, or one of its divisions.-the key or sound of the voice.-the peeping whistle, call, or note of a bird.-the bagpipe; as, the pipes of lucknow.-an elongated body or vein of ore.-a roll formerly used in the english exchequer, otherwise called the great roll, on which were taken down the accounts of debts to the king; -- so called because put together like a pipe.-a boatswain's whistle, used to call the crew to their duties; also, the sound of it.-a cask usually containing two hogsheads, or 126 wine gallons; also, the quantity which it contains.-to play on a pipe, fife, flute, or other tubular wind instrument of music.-to call, convey orders, etc., by means of signals on a pipe or whistle carried by a boatswain.-to emit or have a shrill sound like that of a pipe; to whistle.-to become hollow in the process of solodifying; -- said of an ingot, as of steel.-to perform, as a tune, by playing on a pipe, flute, fife, etc.; to utter in the shrill tone of a pipe.-to call or direct, as a crew, by the boatswain's whistle.-to furnish or equip with pipes; as, to pipe an engine, or a building.