名詞 brass:

1. an alloy of copper and zinc
2. a wind instrument that consists of a brass tube (usually of variable length) that is blown by means of a cup-shaped or funnel-shaped mouthpiece
   同義詞：brass instrument
3. the persons (or committees or departments etc.) who make up a body for the purpose of administering something
   同義詞：administration, governance, governing body, establishment, organization, organisation
4. impudent aggressiveness
   同義詞：boldness, nerve, face, cheek
5. an ornament or utensil made of brass
6. the section of a band or orchestra that plays brass instruments
   同義詞：brass section
7. a memorial made of brass
   同義詞：memorial tablet, plaque

1. He walked in, bold as brass, and asked me to lend him 50!
   他走進來，厚顏無恥地要我借給他50英鎊！
2. Brass is formed by the fusion of copper and zinc.
   黃銅是由銅和鋅熔合制成的。
3. Brass is an alloy of copper and zinc.
   黃銅是銅和鋅的合金。
4. The brass is too loud.
   銅管樂器的聲音太響了。
5. How do you have the brass to say that?
   你怎么有臉那么說呢？

brass

n.（名詞）

A yellowish alloy of copper and zinc, sometimes including small amounts of other metals, but usually '7 percent copper and 33 percent zinc.
黃銅：一種黃色的銅鋅合金，有時含少量其他金屬，但通常為'7%的銅和33%的鋅
Ornaments, objects, or utensils made of this alloy.
黃銅制品：用這種合金制的裝飾品、物件或器皿
Often brasses Music
常作 brasses 【音樂】
The section of a band or an orchestra composed of brass instruments.
黃銅管樂：由黃銅樂器演奏的一段樂曲或管弦樂
Brass instruments or their players considered as a group.
黃銅樂器或銅管樂隊
A memorial plaque or tablet made of brass, especially one on which an effigy is incised.
銅匾：黃銅制的紀(jì)念匾，尤指上面刻有人像的匾
A bushing or similar lining for a bearing, made from a copper alloy.
銅套或銅襯墊：用銅合金制的軸承軸瓦或套筒式襯墊
Informal Bold self-assurance; effrontery.
【非正式用語】 厚顏無恥：魯莽的自我肯定；厚顏無恥
Slang High-ranking military officers or other high officials.
【俚語】 高級軍官，高級官員：高級軍官或其他高級官員
Chiefly British Money.
【多用于英國】 錢

來源：
Middle English bras
中古英語 bras
from Old English brôs
源自 古英語 brôs

【引伸】
brass
adj.（形容詞）