Oxford Dictionary English group captain noun noun BrE BrE//ˌɡruːp ˈkæptɪn// ; NAmE NAmE//ˌɡruːp ˈkæptɪn// (abbreviation Gp Capt) The air force Add to my wordlistjump to other results an officer of high rank in the British air force Group Captain (Jonathan) Sutton See related entries: The air forceCheck pronunciation: group captain oxfordlearnersdictionaries.com