bag·pipe 
/ˈbægˌpaɪp/ noun
plural bag·pipes /ˈbægˌpaɪp/ noun [count] : 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.
▪ He's learning to play the bagpipes. In U.S. English, the singular bagpipe is also used. ▪ We heard the sound of a bagpipe. In both U.S. and British English, bagpipe is sometimes used before another noun. ▪ bagpipe music
▪ He's learning to play the bagpipes. In U.S. English, the singular bagpipe is also used. ▪ We heard the sound of a bagpipe. In both U.S. and British English, bagpipe is sometimes used before another noun. ▪ bagpipe music
