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
Examples of radar in a Sentence
The approaching planes were detected by radar.
Recent Examples on the Web
For something with a bit more coverage but still has that I-own-a-villa-in-Italy vibe, this monochrome Blooming Jelly Bikini Set needs to be on your radar.
—
Samantha Leal, Travel + Leisure, 8 June 2024
Nabiullina has been on the Russian leader’s radar since 2006, when his hometown of St. Petersburg hosted a summit of Group of Eight leaders in what was perhaps a peak moment of global acceptance that Putin craved at the time.
—Rachel Ventresca, Fortune Europe, 7 June 2024
Best bets: What’s on our radar this week (Joshua White / jwpictures.com and Darin Johnstone Architects)
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1.
—Ashley Lee, Los Angeles Times, 6 June 2024
The concern is on the city’s radar as one consideration among many amid rapid development and new construction.
—Darin Oswald, Idaho Statesman, 5 June 2024
See all Example Sentences for radar 
Samantha Leal, Travel + Leisure, 8 June 2024
Nabiullina has been on the Russian leader’s radar since 2006, when his hometown of St. Petersburg hosted a summit of Group of Eight leaders in what was perhaps a peak moment of global acceptance that Putin craved at the time.
—Rachel Ventresca, Fortune Europe, 7 June 2024
Best bets: What’s on our radar this week (Joshua White / jwpictures.com and Darin Johnstone Architects)
Advertisement
1.
—Ashley Lee, Los Angeles Times, 6 June 2024
The concern is on the city’s radar as one consideration among many amid rapid development and new construction.
—Darin Oswald, Idaho Statesman, 5 June 2024
See all Example Sentences for radar
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'radar.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near radar
Cite this Entry
“Radar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radar. Accessed 12 Jun. 2024.
Copy CitationKids Definition
radar
noun
ra·dar
ˈrā-ˌdär 
: a device that sends out radio waves for detecting and locating an object by the reflection of the radio waves and that may use this reflection to find out the position and speed of the object
Etymology
from radio detecting and ranging
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