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
Illmatic’s release initially flew under the mainstream radar.
—
C. Brandon Ogbunu, WIRED, 19 Apr. 2024
All of southeast Michigan is under a severe thunderstorm watch until 7 p.m.
Be prepared for whatever is in Michigan's weather forecast with live doppler radar from the National Weather Service below.
—Tanya Wildt, Detroit Free Press, 17 Apr. 2024
See all Example Sentences for radar 
C. Brandon Ogbunu, WIRED, 19 Apr. 2024
All of southeast Michigan is under a severe thunderstorm watch until 7 p.m.
Be prepared for whatever is in Michigan's weather forecast with live doppler radar from the National Weather Service below.
—Tanya Wildt, Detroit Free Press, 17 Apr. 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 3 May. 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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