For internal combustion engines, the pipe that vents waste gases from the engine.

(music) The largest of all musical instruments, played from an organ console which produces its sound by sending air through whistles and/or reeds called organ pipes, by direct mechanical action, or modernly, electrically.

A tuned metal or wooden tube connected mechanically or electrically to an organ console. / An organ pipe cactus.

plural of pipe cleaner

A tobacco pipe with a long, curved stem.

A conduit for the removal of water or waste water.

plural of pipe organ

Any pipe used for smoking crack cocaine.

A plant of the genus Aristolochia. / A night-blooming cereus, of the species Epiphyllum oxypetalum. / A yellow bird's-nest or pinesap, of the species Monotropa hypopitys.

plural of pipe dream