1 historical, rare A railway carriage that is specially equipped to transport sick or injured people, especially from a war zone. Compare ambulance train .
2A specially equipped motor vehicle used to transport sick or injured people to hospital or other treatment facilities.
Now sometimes applied to a rapid-response car which carries medical equipment but does not necessarily transport patients.
ambulance car/ˈambjʊləns kɑː/ /ˈambjʊl(ə)ns kɑː/
Mid 19th century (in an earlier sense). From ambulance + car.