Definition of: pipe

(pīp) noun
1. An apparatus, usually a small bowl with a hollow stem, for smoking tobacco, opium, or other narcotic.
2. Enough tobacco to fill the bowl of a pipe.
3. A long conducting passage of wood, metal, tiling, etc., for conveying a fluid.
4. A single tube or long, hollow case: when part of a line of piping, often called a piece of pipe.
5. Any hollow or tubular part in an animal or plant body.
6. Music a A tubular wind instrument, such as the flageolet, b plural The bagpipe.
7. The voice; also, a bird's note or call.
8. A large cask for wine; also, a liquid measure of half a tun.
9. Metall. A conical cavity in the head of a steel ingot, made by an escape of gas while the metal was cooling.
10. Slang An easy college course.
11. A boatswain's whistle.
12. Mining An elongated, usually vertical or highly inclined body of mineral or rich ore: also called a chimney.
—v. piped, pip·ing v.i.
1. To play on a pipe.
2. To make a shrill sound.
3. Naut. To signal the crew by means of a boatswain's pipe.
4. Metall. To form conical cavities in hardening, as ingots.
—v.t.
5. To convey by or as by means of pipes.
6. To provide with pipes.
7. To play, as a tune, on a pipe.
8. To utter shrilly or in a high key.
9. Naut. To call to order by means of a boatswain's pipe.
10. To lead, entice, or bring by piping.
11. To trim, as a dress, with piping.
—to pipe down Slang To become silent; stop talking or making noise.
—to pipe up
1. To start playing or singing: Pipe up the band!
2. To speak out, especially in a shrill voice. [OE pīpe, ult. <L pipare cheep. Doublet of FIFE.]