a hollow cylinder of metal, wood, or other material, used for the conveyance of water, gas, steam, petroleum, etc.

a tube of wood, clay, hard rubber, or other material, with a small bowl at one end, used for smoking tobacco, opium, etc.

a quantity, as of tobacco, that fills the bowl of such a smoking utensil.

Music .

a tube used as, or to form an essential part of, a musical wind instrument.

a musical wind instrument consisting of a single tube of straw, reed, wood, or other material, as a flute, clarinet, or oboe.

one of the wooden or metal tubes from which the tones of an organ are produced.

a small end-blown flute played with one hand while the other beats a small drum.

Nautical .

boatswain's pipe.

the sound of a boatswain's pipe.

the call or utterance of a bird, frog, etc.

pipes, Informal . the human vocal cords or the voice, esp. as used in singing.

Usually, pipes.

Music . bagpipe.

a set of flutes, as a panpipe.

Informal . a tubular organ or passage of a human or animal body, esp. a respiratory passage

to complain of congested pipes.

any of various tubular or cylindrical objects, parts, or formations, as an eruptive passage of a volcano or geyser.

Mining .

a cylindrical vein or body of ore.

(in South Africa) a vertical, cylindrical matrix, of intrusive igneous origin, in which diamonds are found.

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.

Botany . the stem of a plant.

to play on a pipe.

Nautical . to signal, as with a boatswain's pipe.

to speak in a high-pitched or piercing tone.

to make or utter a shrill sound like that of a pipe

songbirds piping at dawn.

to convey by or as by pipes

to pipe water from the lake.

to supply with pipes.

to play (music) on a pipe or pipes.

to summon, order, etc., by sounding the boatswain's pipe or whistle

all hands were piped on deck.

to bring, lead, etc., by or as by playing on a pipe

to pipe dancers.

to utter in a shrill tone

to pipe a command.

to trim or finish with piping, as an article of clothing.

Cookery . to force (dough, frosting, etc.) through a pastry tube onto a baking sheet, cake or pie, etc.

Informal . to convey by an electrical wire or cable

to pipe a signal from the antenna.

Slang . to look at; notice

Pipe the cat in the hat.

pipe down, Slang . to stop talking; be quiet

He shouted at us to pipe down.

pipe up,

to begin to play (a musical instrument) or to sing.

to make oneself heard; speak up, esp. as to assert oneself.

to increase in velocity, as the wind.

noun

aqueduct , canal , channel , conduit , conveyer , duct , hose , line , main , pipeline , sewer , spout , trough , vent , vessel

verb

bring in , carry , channel , convey , funnel , siphon , supply , traject , transmit , blubber * , boohoo * , cheep * , cry , play , say , shout , sing , sob , sound , speak , talk , toot * , trill , tweet , twitter , wail , warble , weep , whistle , aqueduct , briar , canal , cask , conductor , conduit , drain , duct , flue , flute , hookah , hose , instrument , leader , main , outlet , passage , peep , reed , sewer , spout , stack , trough , tube