king's counsel noun Usage: usually capitalized K&C 1.: a group of barristers of preeminence selected upon nomination of the lord chancellor to serve as counsel to the British crown and as such entitled to certain honorary privileges (as the wearing of a silk gown) 2.: a member of this group of barristers < the first woman attorney to win the high legal distinction of being a King's Counsel — P.J.Noel-Baker >