- Radar is a device that uses reflected radio waves to detect the position or movement of a person or thing.
An example of radar is the device highway patrol officers use to detect people who are driving too fast.
A policeman using a radar gun.
Origin of radarra(dio) d(etecting) a(nd) r(anging)
- A method of detecting distant objects and determining their position, velocity, or other characteristics by analysis of very high frequency radio waves reflected from their surfaces.
- The equipment used in such detection.
Origin of radarra(dio) d(etecting) a(nd) r(anging).
(countable and uncountable, plural radars)
- (uncountable) A method of detecting distant objects and determining their position, velocity, or other characteristics by analysis of sent radio waves (usually microwaves) reflected from their surfaces
- (countable) A type of system using such method, differentiated by platform, configuration, frequency, power, and other technical attributes.
- (countable) An installation of such a system or of the transmitting and receiving apparatus.
- (countable, figuratively) A superior ability to detect something.
- His sensitive radar for hidden alliances keeps him out of trouble.
(third-person singular simple present radars, present participle radaring, simple past and past participle radared)
- To scan with radar, or as if with radar.
radar - Computer Definition
A microwave radio technology that uses reflected energy to detect and determine the direction of and distance to remote objects. Multiple return signals can be correlated over time to determine the velocity and direction of moving objects. Applications include navigation, targeting, and tracking for civilian and military purposes. See also microwave, radio, and sonar.