radar

[ rey-dahr ]

noun

1. Electronics. a device for determining the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns.
2. a means or sense of awareness or perception:

   lobbyists working under the media's radar.

radar

/ ˈreɪdɑː /

noun

1. a method for detecting the position and velocity of a distant object, such as an aircraft A narrow beam of extremely high-frequency radio pulses is transmitted and reflected by the object back to the transmitter, the signal being displayed on a radarscope. The direction of the reflected beam and the time between transmission and reception of a pulse determine the position of the object Former nameradiolocation
2. the equipment used in such detection

radar

/ rā′där /

1. A method of detecting distant objects and determining their position, speed, material composition, or other characteristics by causing radio waves to be reflected from them and analyzing the reflected waves. The waves can be converted into images, as for use on weather maps.
2. The equipment used in such detecting.
3. See also Doppler effect

radar

1. A method of finding the position and velocity of an object by bouncing a radio wave off it and analyzing the reflected wave. Radar is an acronym for ra dio d etection a nd r anging.

Notes

Police use radar techniques to determine the speed of automobiles.

Other Words From

• anti·radar noun adjective

Word History and Origins

Origin of radar¹

1940–45, Americanism; ra(dio) d(etecting) a(nd) r(anging)

Word History and Origins

Origin of radar¹

C20 ra ( dio ) d ( etecting ) a ( nd ) r ( anging )

Example Sentences

Also, Google rolling out dark themes in search is something that should not surprise anyone but should be on the radars of search marketers.

From Search Engine Land

You just … Some of the opportunities I’ve had, I didn’t even know I was on anybody’s radar.

From Ozy

A stealth aircraft, it can’t be seen by radar, but your eyes will definitely be able to spot it.

From Popular-Science

In an interview, Davis said the bill was not on his radar until the teenagers contacted him.

From Washington Post

She also says Victorian wallpapers and William Morris prints will enjoy a revival, and Victorian and neoclassical styles, which have been under the radar, will be popping up in homes.

From Washington Post

There should be a retrievable record of exactly when the Airbus disappeared from radar.

From The Daily Beast

The flight path remained close to the Indonesian archipelago, well within what is the normal reach of air traffic control radar.

From The Daily Beast

“He went to the top of my radar screen,” Tancredo told The Daily Beast.

From The Daily Beast

The radar stations would be used to guide interceptors to their targets while the training range would be used to train pilots.

From The Daily Beast

“They are furious with Pippa,” an aristocratic source told Radar Online at the time.

From The Daily Beast

I was hanging on to him trying to see around and over and even under the Zloomph—steering by a sort of radar-like sixth sense.

From Project Gutenberg

It loomed against the cold glory of stars like a pit of ultimate darkness, and Jessup had to guide the boat in with radar.

From Project Gutenberg

Then there were some tiny radar-blips, which could have indicated meteors.

From Project Gutenberg

I cut out the radar and cut in the nose orthicon and sat back to watch the beacon appear on the screen.

From Project Gutenberg

When Thomas told me the nature of the damage to our radar and communications systems, that was another hint.

From Project Gutenberg

Related Words

• sonar