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TOEFL IELTS BNC: 7112 COCA: 4780

radar

radar /ˈreɪˌdɑɚ/ noun
plural radars
radar
/ˈreɪˌdɑɚ/
noun
plural radars
Learner's definition of RADAR
: a device that sends out radio waves for finding out the position and speed of a moving object (such as an airplane)雷达
[count]
[noncount]
often used figuratively in informal U.S. English在非正式美国英语中常用作比喻
TOEFL IELTS BNC: 7112 COCA: 4780

radar

noun

ra·​dar ˈrā-ˌdär How to pronounce radar (audio)
often attributive
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

Example Sentences

The approaching planes were detected by radar.
Recent Examples on the Web In response to these policy setbacks, drone delivery companies have more recently adopted a less conspicuous strategy for acquiring private airspace rights that is flying under the radar of most property owners. Troy Rule, Fortune, 2 Sep. 2022 Parents should also understand that consensual sharing of intimate images between adolescents, which was barely on the radar of psychologists 15 or so years ago, is no longer seen as developmentally inappropriate, said Rutledge. Elizabeth Chang, Washington Post, 29 Aug. 2022 Not only are there Pac-12 schools on the radar of the Big Ten, but schools such as Arizona, Utah, Colorado and Arizona State have all generated interest from the Big 12. Jeremy Cluff, The Arizona Republic, 26 Aug. 2022 What many of those customers did not know is that the business was on the radar of federal law enforcement. Andrew Wimer, Forbes, 17 Aug. 2022 Brown, for instance, has been on the radar of law enforcement across the country. Danny Mcdonald, BostonGlobe.com, 10 Aug. 2022 For months, Perry has been on the radar of the House select committee investigating the Capitol riot. Kim Bellware, Anchorage Daily News, 10 Aug. 2022 Because by the time my father met Greenberg, while my mom was trying to play the happy homemaker in Easton, Dan McGuiness had found himself on the radar of the DEA. Kristen Mcguiness, Rolling Stone, 7 Aug. 2022 Heart health is on the radar of other wearable device developers. Sophie Bushwick, Scientific American, 29 July 2022 See More

Word History

Etymology

radio detecting and ranging

First Known Use

1941, in the meaning defined at sense 1

Time Traveler
The first known use of radar was in 1941
TOEFL IELTS BNC: 7112 COCA: 4780
radar

noun

ADJECTIVE | VERB + RADAR | RADAR + NOUN | PREPOSITION | PHRASES ADJECTIVEenemy, police敵方雷達;警方雷達airborne, ground, ground-based機載/地面/陸基雷達long-range遠程雷達VERB + RADARbe equipped with配備雷達RADAR + NOUNoperator雷達操作員station, system雷達站;雷達系統antenna, detector, equipment, instrument, receiver, scanner, transmitter雷達天線/探測器/裝備/裝置/接收機/掃描儀/發射機screen雷達熒光屏beam, signal雷達波束/信號image雷達影像PREPOSITIONby radar通過雷達navigation by radar通過雷達導航on radar用雷達The submarine is impossible to detect on radar.雷達不可能探測到這種潛艇。PHRASESoff the radar, on the radar不在/在雷達的觀測範圍之內;不引人/引人注目The aircraft suddenly went off the radar.飛機突然從雷達顯示屏上消失了。He's barely on the radar of most movie-goers. (figurative) 大多數常看電影的人幾乎很少關注他。

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