pipe(noun)

a tube, usually made of metal, earthenware etc, through which water, gas etc can flow

a water pipe; a drainpipe.

pipe(verb)

to convey gas, water etc by a pipe

Water is piped to the town from the reservoir.

pipe(noun)

a small tube with a bowl at one end, in which tobacco is smoked

He smokes a pipe; (also adjective) pipe tobacco.

pipe(verb)

to play (music) on a pipe or pipes

He piped a tune.

pipe(noun)

a musical instrument consisting of a hollow wooden, metal etc tube through which the player blows or causes air to be blown in order to make a sound

He played a tune on a bamboo pipe; an organ pipe.

pipe(verb)

to speak in a high voice, make a high-pitched sound

`Hallo,' the little girl piped.