A policeman using a radar gun.
An example of radar is the device highway patrol officers use to detect people who are driving too fast.
- any of various systems or devices using reflected radio waves to locate fixed objects and track moving ones: a radar system typically consists of a transmitter, receiver, and display screen, and is used in navigation, air traffic control, meteorology, mapping, etc.
- a special ability to perceive, recognize, or find a particular kind of thing, behavior, etc.: a teacher's radar for plagiarism
Origin of radarra(dio) d(etecting) a(nd) r(anging)
on (or off) the (or someone's) radar screen
under the radar screen
- beyond someone's ability to notice or perceive
- not attracting someone’s attention; not making an impression on someone
- 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).
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.