English

Noun

top brass ‎(uncountable)

1. (idiomatic, colloquial) A group of people who are the leaders or heads of an organization.
   • 1872, New Zealand Parliament, House of Representatives, “Parliamentary debates”, in 57, volume 1-6, page 649:

     The top brass of the army are up to various types of mischief and they do not want the public or even Members of Parliament to know about them.

Synonyms

• (group of persons who are the leaders): governance, governing body, organisation/organization, administration, establishment