1. (n.) 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.

2. (n.) Any long tube or hollow body of wood, metal, earthenware, or the like: especially, one used as a conductor of water, steam, gas, etc.

3. (n.) A small bowl with a hollow steam, -- used in smoking tobacco, and, sometimes, other substances.

4. (n.) A passageway for the air in speaking and breathing; the windpipe, or one of its divisions.

5. (n.) The key or sound of the voice.

6. (n.) The peeping whistle, call, or note of a bird.

7. (n.) The bagpipe; as, the pipes of Lucknow.

8. (n.) An elongated body or vein of ore.

9. (n.) 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.

10. (n.) A boatswain's whistle, used to call the crew to their duties; also, the sound of it.

11. (n.) A cask usually containing two hogsheads, or 126 wine gallons; also, the quantity which it contains.

12. (v. i.) To play on a pipe, fife, flute, or other tubular wind instrument of music.

13. (v. i.) To call, convey orders, etc., by means of signals on a pipe or whistle carried by a boatswain.

14. (v. i.) To emit or have a shrill sound like that of a pipe; to whistle.

15. (v. i.) To become hollow in the process of solidifying; -- said of an ingot, as of steel.

16. (v. t.) To perform, as a tune, by playing on a pipe, flute, fife, etc.; to utter in the shrill tone of a pipe.

17. (v. t.) To call or direct, as a crew, by the boatswain's whistle.

18. (v. t.) To furnish or equip with pipes; as, to pipe an engine, or a building.

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