As a Noun:
1. A vehicle for taking people to or from hospital. English = ambulance.
2. An alarm or siren, usually attached to the top of a vehicle, that consists of a rotating and/or flashing light, with or without an audible alarm.
As a Verb or Adjective:
1. Of a visual alarm or siren, especially one on top of a vehicle such as an ambulance, to rotate and flash.