radar

/ʁa.daʁ/
1.
nounmasculine

system that uses radio waves to detect, locate, and track objects (e.g., aircraft, ships, weather formations)

Les contrôleurs aériens utilisent le radar pour suivre les avions.

Air traffic controllers use radar to track aircraft.

2.
nounmasculine

speed camera (device used by police to record vehicle speed)

Attention, il y a un radar juste après la sortie de l'autoroute.

Watch out, there's a speed camera just after the highway exit.

3.
nounmasculine

awareness or consideration (used in expressions like 'être sur le radar')

Ce dossier n'est pas du tout sur mon radar pour l'instant.

That file isn't on my radar at all right now.