brass/bræs; brɑːs/n [U] 1 a shiny yellow metal that is a mixture of COPPER and ZINC 黄铜2 a) musical instruments that are made of metal, such as the TRUMPET 铜管乐器: a brass band 铜管乐队 b) the brass (section) the people in an ORCHESTRAR or band who play musical instruments that are made of metal〔管弦乐队等的〕铜管乐器组see box at见 ORCHESTRA 方框