n.

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;
   brass instrument
3. the persons (or committees or departments etc.) who make up a body for the purpose of administering something;
   administration, governance, governing body, establishment, organization, organisation
   
   • 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
4. impudent aggressiveness;
   boldness, nerve, face, cheek
   
   • I couldn't believe her boldness
   • he had the effrontery to question my honesty
5. an ornament or utensil made of brass
6. the section of a band or orchestra that plays brass instruments;
   brass section
7. a memorial made of brass;
   memorial tablet, plaque