B1
a special vehicle used to take ill or injured people to the hospital
Dictionary examples:
My dad's snoring is so loud, the neighbors called an ambulance! (0.0)
I called an ambulance because my phone was dying! (0.0)
The ambulance arrived so fast, it beat the pizza delivery guy! (0.0)
I called for an ambulance. (15.2)
an ambulance driver (16.5)