St ˌJohn ˈAmbulance BrE AmE ( also St John's Ambulance )
a British organization whose unpaid members are trained to give ↑ first aid to anyone who is hurt or becomes ill. They often attend sports and other public events.
ST JOHN'S AMBULANCE
Meaning of ST JOHN'S AMBULANCE in English
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012