radar astronomy noun

The use of pulsed radio signals to measure distances and map the surfaces of objects in the solar system

radar beacon noun

A fixed radio transmitter whose signals enable an aircraft, by means of its radar equipment, to determine its position and direction

radar gun noun

A speed gun (qv) that operates by means of radar

raˈdarscope noun

A cathode-ray oscilloscope on which radar signals can be seen

radar trap noun

A device using radar which enables the police to identify motorists exceeding the speed limit over a particular section of the road (see also speed trap under speed)