the room where a group of people (especially the board of a company or organization) conducts its meetings
1830: Charles Babbage, Decline of Science in Englanda President of the Royal Society, in the Board-room of the British Museum, is quite as likely as another person to sacrifice his public duty to the influence of power, or to private friendship.
(figuratively) corporations or corporate management considered as a section of society
Though the new law is popular among the general public, it is hated in the boardroom.