am ‧ bu ‧ lance S3 /ˈæmbjələns, ˈæmbjʊləns/ BrE AmE noun [countable]
[ Date: 1800-1900 ; Language: French ; Origin: 'place near a battle where wounds are treated' , from ambulant 'walking' , from Latin ambulare ; ⇨ ↑ amble ]
a special vehicle that is used to take people who are ill or injured to hospital:
the ambulance service
ambulance staff/crew/worker
The ambulance crew removed him from the wreckage.
the ambulance service
by ambulance
Mike had to be taken by ambulance to hospital.
Do you think we need to call an ambulance (=phone to ask an ambulance to come) ?