blue light
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blue emergency light
The flashing blue warning light on emergency vehicles such as police cars, fire engines, or ambulances.
Als der Fahrer das Blaulicht im Rückspiegel sah, bildete er sofort eine Rettungsgasse.
When the driver saw the blue emergency light in the rearview mirror, he immediately formed an emergency lane.
emergency vehicle
Colloquially, an emergency vehicle itself that is equipped with such a light.
Nach dem Unfall war die Straße voller Blaulicht.
After the accident, the street was full of emergency vehicles.
The word is a simple and logical compound made up of the adjective 'blau' (blue) and the noun 'das Licht' (light). So it literally describes a light that is blue.
Das blaue Licht des Polizeiautos spiegelte sich in den Fenstern.
The blue light of the police car was reflected in the windows.
'Blaulicht' (blue emergency light) is often used in the fixed phrase 'mit Blaulicht fahren' (to drive with blue lights on). Common verbs are also 'einschalten' (to switch on) and 'sehen' (to see).
Der Krankenwagen fuhr mit Blaulicht und Sirene durch die Stadt.
The ambulance drove through the city with its blue lights and siren on.
In colloquial speech, 'das Blaulicht' (the emergency vehicle) can also refer to the entire emergency vehicle, such as a police car or ambulance. In this meaning, it is often used as a collective term in the singular, even when several vehicles are meant.
Nach dem Anruf kam sofort das Blaulicht.
After the call, the emergency vehicle arrived immediately.
