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(countable, uncountable) A metallic alloy of copper and zinc used in many industrial and plumbing applications.
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(music) A class of wind instruments, usually made of metal (such as brass), that use vibrations of the player's lips to produce sound; a band or the section of an orchestra that features such instruments.
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Spent cartridge casings (usually made of brass): the part of the cartridge left over after bullets or shells have been fired.
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(uncountable) The color of brass.
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(military, business or other organizations, uncountable, used as a singular or plural noun, metonymic) High-ranking officers: the brass hats.
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(uncountable, informal) A brave or foolhardy attitude; impudence.
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(slang, dated, Potteries) Money.
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Inferior composition.