brass 
(brăs)
(brăs)n.
1.
a. A yellowish alloy of copper and zinc, sometimes including small amounts of other metals, but usually 67 percent copper and 33 percent zinc.
b. Ornaments, objects, or utensils made of this alloy.
2. often brasses Music
a. The section of a band or an orchestra composed of brass instruments.
b. Brass instruments or their players considered as a group.
3. A memorial plaque or tablet made of brass, especially one on which an effigy is incised.
4. A bushing or similar lining for a bearing, made from a copper alloy.
5. Informal Bold self-assurance; effrontery.
6. Slang High-ranking military officers or other high officials.
7. Chiefly British Money.
[Middle English bras, from Old English bræs.]
brass adj.