Learner's definition of BAGPIPE
a musical instrument that is played especially in Scotland and that has a bag, a tube for blowing air into the bag, and pipes where the air leaves and makes sounds
◊ The musical instrument is usually referred to by the plural bagpipes.
◊ In U.S. English, the singular bagpipe is also used.
◊ In both U.S. and British English, bagpipe is sometimes used before another noun.