noun, verb, piped, pip⋅ing.| 1. | a hollow cylinder of metal, wood, or other material, used for the conveyance of water, gas, steam, petroleum, etc. |
| 2. | a tube of wood, clay, hard rubber, or other material, with a small bowl at one end, used for smoking tobacco, opium, etc. |
| 3. | a quantity, as of tobacco, that fills the bowl of such a smoking utensil. |
| 4. | Music.
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| 5. | Nautical.
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| 6. | the call or utterance of a bird, frog, etc. |
| 7. | pipes, Informal. the human vocal cords or the voice, esp. as used in singing. |
| 8. | Usually, pipes.
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| 9. | any of various tubular or cylindrical objects, parts, or formations, as an eruptive passage of a volcano or geyser. |
| 10. | Mining.
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| 11. | Metallurgy. a depression occurring at the center of the head of an ingot as a result of the tendency of solidification to begin at the bottom and sides of the ingot mold. |
| 12. | Botany. the stem of a plant. |
| 13. | to play on a pipe. |
| 14. | Nautical. to signal, as with a boatswain's pipe. |
| 15. | to speak in a high-pitched or piercing tone. |
| 16. | to make or utter a shrill sound like that of a pipe: songbirds piping at dawn. |
| 17. | to convey by or as by pipes: to pipe water from the lake. |
| 18. | to supply with pipes. |
| 19. | to play (music) on a pipe or pipes. |
| 20. | to summon, order, etc., by sounding the boatswain's pipe or whistle: all hands were piped on deck. |
| 21. | to bring, lead, etc., by or as by playing on a pipe: to pipe dancers. |
| 22. | to utter in a shrill tone: to pipe a command. |
| 23. | to trim or finish with piping, as an article of clothing. |
| 24. | Cookery. to force (dough, frosting, etc.) through a pastry tube onto a baking sheet, cake or pie, etc. |
| 25. | Informal. to convey by an electrical wire or cable: to pipe a signal from the antenna. |
| 26. | Slang. to look at; notice: Pipe the cat in the hat. |
| 27. | pipe down, Slang. to stop talking; be quiet: He shouted at us to pipe down. |
| 28. | pipe up,
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pipe (pīp) Pronunciation Key
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pipe down
Stop talking, be quiet, as in I wish you children would pipe down. This idiom is also used as an imperative, as in Pipe down! We want to listen to the opera. It comes from the navy, where the signal for all hands to turn in was sometimes sounded on a whistle or pipe. By 1900 it had been transferred to more general use.