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
Though still under the radar for many American drinkers, Alto Adige quietly turns out some of Italy’s most consistently impressive bottles, with a track record of top medals in major competitions.
—
Joseph V Micallef,
Forbes.com,
25 June 2026
While the platform is still mostly flying under the radar — a hard-to-find tab on the Amazon website — the online retail giant is looking to build up inventory from local dealerships across the country and eventually make cars as easy to buy as paper towels, toilet paper and detergent.
—
Robert Channick,
Chicago Tribune,
25 June 2026
One bridge deck inspection robot uses subsurface radar, electrical tools that measure moisture, and a standard camera to collect data.
—
Alex Krasnok,
Scientific American,
25 June 2026
An officer and junior officer monitor the radar and navigation, while another sailor sits at the helm and oversees steering the vessel and monitoring the engines.
—
Tara Lynch,
CBS News,
25 June 2026
See All Example Sentences for radar
Examples are automatically compiled from online sources to
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Joseph V Micallef,
Forbes.com,
25 June 2026
While the platform is still mostly flying under the radar — a hard-to-find tab on the Amazon website — the online retail giant is looking to build up inventory from local dealerships across the country and eventually make cars as easy to buy as paper towels, toilet paper and detergent.
—
Robert Channick,
Chicago Tribune,
25 June 2026
One bridge deck inspection robot uses subsurface radar, electrical tools that measure moisture, and a standard camera to collect data.
—
Alex Krasnok,
Scientific American,
25 June 2026
An officer and junior officer monitor the radar and navigation, while another sailor sits at the helm and oversees steering the vessel and monitoring the engines.
—
Tara Lynch,
CBS News,
25 June 2026
See All Example Sentences for radar
Cite this Entry
“Radar.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/radar. Accessed 30 Jun. 2026.
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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