From Longman Dictionary of Contemporary Englishmarching bandˈmarching ˌband noun [countable] APMa group of musicians who march as they play musical instruments
Examples from the Corpus
marching band• It started with a marching band, or at least the lingering sounds of one.• Another kind of KLEZmer group had the instrumentation of a small military or marching band.• Klein says she stays involved as editor of her high school paper, and Nyberg makes friends in the school marching band.• The old town square was filled with people and the jubilant sound of the marching band as performers juggled fire. 