Noun

1. A rigid tube that transports water, steam or other fluid, as used in plumbing and numerous other applications.
2. A hollow stem with bowl at one end used for smoking, especially a tobacco pipe but also including various other forms such as a water pipe.
3. A vertical conduit through the Earth's crust below a volcano, through which magma has passed; often filled with volcanic breccia
4. A type of pasta, similar to macaroni
5. Decorative edging stitched to the hems or seams of an object made of fabric (clothing, hats, pillows, curtains, etc.); often a contrasting color
6. A hollow tube used to produce sound, such as an organ pipe.
7. A wind instrument making a whistling sound. (see pan pipes, bagpipe, boatswain's pipe)
8. One of the goalposts of the goal.
9. The ASCII character at position 124 (decimal), 7C (hex), 01111100 (binary): " | "
10. A mechanism that enables one program to communicate with another by sending its output to the other as input.
11. A data backbone, or broadband Internet access.

    A fat pipe refers to a high-bandwidth connection.

12. An English measure of capacity for liquids, containing 126 wine gallons; half a ton.
    • 1882: Again, by 28 Hen. VIII, cap. 14, it is re-enacted that the tun of wine should contain 252 gallons, a butt of Malmsey 126 gallons, a pipe 126 gallons, a tercian or puncheon 84 gallons, a hogshead 63 gallons, a tierce 41 gallons, a barrel 31.5 gallons, a rundlet 18.5 gallons. — James Edwin Thorold Rogers, A History of Agriculture and Prices in England, p. 205.
13. An anonymous satire or essay, insulting and frequently libelous, written on a piece of paper and left somewhere public where it could be found and thus spread, to embarrass the author's enemies.

    1818: yet, it is much to be hoped, that from his example pipe-making will in future be reposed solely in the hands of Mr. William Cluer of the Brickfield Hill. — Sydney Gazette, 26 September 1818, on William Bland convicted of libelling Governor Macquarie in a pipe (William Cluer was an earthenware pipe manufacturer). Quoted in More Pig Bites Baby! Stories from Australia's First Newspaper, volume 2, ed. Micahel Connor, Duffy and Snellgrove, 2004, ISBN 1-876631-91-0.

Verb

1. To convey or transport something by means of pipes.
2. In Unix, to directly feed the output of one program as input to another program by use of the pipe character.
3. To install or configure pipes.
4. To play music on a pipe instrument, such as a bagpipe.
5. To signal or order by a note pattern on a bosun's pipe.
6. To decorate a cake using a pastry bag a flexible bag from which icing is forced through a small nozzle to make various designs