radar

noun

1. A device or system consisting usually of a synchronized radio transmitter and receiver that emits radio waves and processes their reflections for display and is used especially for detecting and locating objects (such as aircraft) or surface features (as of a planet)
2. Range of notice

   "fell off the radar after losing their first three games"

noun

1. Astronomy in which celestial bodies in the solar system are studied by analyzing the return of radio waves directed at them

noun

1. A radar transmitter that upon receiving a radar signal emits a signal which reinforces the normal reflected signal or which introduces a code into the reflected signal especially for identification purposes

noun

1. Adaptive cruise control

noun

1. A device designed to alert the operator of a vehicle when it has been targeted by a radar beam (as from a police officer's radar gun)

   "After fastening a radar detector to the windshield, he slaloms through traffic at illegal speeds for the seven-mile trip to Chrysler's Styling Dome …"

2. Radar gun

   "The officer's radar detector recorded the vehicle speed between 55 and 60 mph, with the speed reaching 70 mph at one point on the 55 mph-limit roadway."

noun

1. A handheld device that uses radar to measure the speed of a moving object

adjective

1. Used or designed to counteract or destroy radar systems

   "anti-radar missiles"

noun

1. A radar system that utilizes the Doppler effect for measuring velocity

idiom

1. To stop being noticed or talked about

   "an actor who has fallen off the radar"

idiom

1. Being something someone is at all considering or thinking about

   "A career in politics wasn't even on my radar (screen) at that point."