ra·dar
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Definition of radar
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
Examples of radar in a Sentence
The approaching planes were detected by radar.
Recent Examples on the Web
Despite that more than half of those cases – at least 400,000 – involve children, many offenders slip under the radar and end up on voluntary leadership roles unnoticed, background check experts warn. — Fox News, "Churches conducting more background checks, but sex offenders still slipping through cracks," 24 Aug. 2019 On the island of Miyako, among sugar-cane fields, Japan’s Ground Self-Defense Force opened a new base in March that will accommodate 700 to 800 troops, anti-ship and surface-to-air missile batteries, and radar and intelligence-gathering facilities. — Washington Post, "Japan builds an ‘island wall’ to counter China’s intensifying military, territorial incursions," 21 Aug. 2019These example sentences are selected automatically from various online news sources to reflect current usage of the word 'radar.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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More Definitions for radar
radar
noun
English Language Learners 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)
See the full definition for radar in the English Language Learners Dictionary
radar
noun
ra·dar
| \ ˈrā-ˌdär
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Kids Definition of radar
: a radio device for detecting the position of things in the distance and the direction of moving objects (as distant airplanes or ships)
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