What is the meaning of brass?

noun

• An alloy of copper and zinc.
• 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.
  • synonyms: brass instrument
• The persons (or committees or departments etc.) who make up a body for the purpose of administering something.
  • usage: "he claims that the present administration is corrupt"; "the governance of an association is responsible to its members"; "he quickly became recognized as a member of the establishment"
  • synonyms: administration, governance, governing body, establishment, organization, organisation
• Impudent aggressiveness.
  • usage: "I couldn't believe her boldness"; "he had the effrontery to question my honesty"
  • synonyms: boldness, nerve, face, cheek
• An ornament or utensil made of brass.
• The section of a band or orchestra that plays brass instruments.
  • synonyms: brass section
• A memorial made of brass.
  • synonyms: memorial tablet, plaque