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
Not being drafted in the second, third, or fourth round wasn't even on the radar.
—
Evan Massey, MSNBC Newsweek, 2 Aug. 2025
In the flurry of updates to Windows 11, and Microsoft’s exhortations to upgrade your Windows 10 software, another operating system may have flown under your radar.
—David Phelan, Forbes.com, 2 Aug. 2025
Though Trump had spoken glowingly of Combs in the past, there wasn’t much evidence to suggest this case was on the president’s radar.
—Cheyenne Roundtree, Rolling Stone, 31 July 2025
To do this, the satellite will use duel-frequency radar sensors.
—Kenna Hughes-Castleberry, Space.com, 30 July 2025
See All Example Sentences for radar
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Evan Massey, MSNBC Newsweek, 2 Aug. 2025
In the flurry of updates to Windows 11, and Microsoft’s exhortations to upgrade your Windows 10 software, another operating system may have flown under your radar.
—David Phelan, Forbes.com, 2 Aug. 2025
Though Trump had spoken glowingly of Combs in the past, there wasn’t much evidence to suggest this case was on the president’s radar.
—Cheyenne Roundtree, Rolling Stone, 31 July 2025
To do this, the satellite will use duel-frequency radar sensors.
—Kenna Hughes-Castleberry, Space.com, 30 July 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 Aug. 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share