A group of instrumental musicians who generally perform outdoors, and who often incorporate movement - usually some type of marching - with their musical performance.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "marching band" in a sentence
"She had played clarinet in the marching band at Springfield College and would be the first to tell you that had been a long time ago."
"Their cries barely carried over the cheers and shouts that roared down from the Shadyside supporters, and the loud blasts and drumrolls from the Shadyside marching band in their own bleachers near the end zone."
"Stocking the home team locker room with iced champagne, he hired the University of Southern California marching band to play “Happy Days Are Here Again” and worked out details on paper as to how the Lakers should be interviewed after the big win."