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
Consider Rumi’s dalliance with illegally downloading music, which puts him on the radar of a not-so-mysterious pen pal known as Curious_George_Bush43!
—
Proma Khosla, IndieWire, 2 June 2025
The airport, one of the largest near New York City, had at least two radar outages this month, shining a spotlight on outdated technology, and has a deficit of air traffic controllers.
—Filip Timotija, The Hill, 31 May 2025
Listen to this article Disturbing developments that indicate climate change is getting worse keep surfacing, even as the consequences for planet Earth seem to fall farther off the public radar.
—Michael Smolens, San Diego Union-Tribune, 30 May 2025
Budget constraints have hindered the purchase and maintenance of national state-of-the-art equipment, such as radar systems and satellite technology providing data for tracking hurricanes and predicting their paths.
—Bryan Karrick, The Orlando Sentinel, 30 May 2025
See All Example Sentences for radar
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Proma Khosla, IndieWire, 2 June 2025
The airport, one of the largest near New York City, had at least two radar outages this month, shining a spotlight on outdated technology, and has a deficit of air traffic controllers.
—Filip Timotija, The Hill, 31 May 2025
Listen to this article Disturbing developments that indicate climate change is getting worse keep surfacing, even as the consequences for planet Earth seem to fall farther off the public radar.
—Michael Smolens, San Diego Union-Tribune, 30 May 2025
Budget constraints have hindered the purchase and maintenance of national state-of-the-art equipment, such as radar systems and satellite technology providing data for tracking hurricanes and predicting their paths.
—Bryan Karrick, The Orlando Sentinel, 30 May 2025
See All Example Sentences for radar
Cite this Entry
“Radar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radar. Accessed 6 Jun. 2025.
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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