Oxford Dictionary English KC nounnoun BrE BrE//ˌkeɪ ˈsiː// ; NAmE NAmE//ˌkeɪ ˈsiː// Add to my wordlistjump to other resultsthe highest level of barrister, who can speak for the government in court in Britain. KC is the abbreviation for ‘King’s Counsel’ and is used when there is a king in Britain. compare QCCheck pronunciation: KC oxfordlearnersdictionaries.com