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
Data is also collected from instruments aboard commercial aircraft, surface observing stations, satellites, radars, and buoys.
—
Thomas G. Moukawsher, Newsweek, 21 Mar. 2025
Drone detection systems are typically either RF or radar based.
—James Hibberd, The Hollywood Reporter, 21 Mar. 2025
The Boeing 777 plane vanished from radar shortly after taking off on March 8, 2014, carrying 239 people, mostly Chinese nationals, on a flight from Malaysia's capital, Kuala Lumpur, to Beijing.
—Compiled By Democrat-Gazette Staff From Wire Reports, arkansasonline.com, 21 Mar. 2025
At this stage in his development, already on the NBA’s radar, Ball is a critical part to an equation that could extend the Huskies’ season further than most expect.
—Joe Arruda, Hartford Courant, 20 Mar. 2025
See All Example Sentences for radar
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Thomas G. Moukawsher, Newsweek, 21 Mar. 2025
Drone detection systems are typically either RF or radar based.
—James Hibberd, The Hollywood Reporter, 21 Mar. 2025
The Boeing 777 plane vanished from radar shortly after taking off on March 8, 2014, carrying 239 people, mostly Chinese nationals, on a flight from Malaysia's capital, Kuala Lumpur, to Beijing.
—Compiled By Democrat-Gazette Staff From Wire Reports, arkansasonline.com, 21 Mar. 2025
At this stage in his development, already on the NBA’s radar, Ball is a critical part to an equation that could extend the Huskies’ season further than most expect.
—Joe Arruda, Hartford Courant, 20 Mar. 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 28 Mar. 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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