en
radar
/ˈreɪ.dɑːr/
Definition
1
A system for detecting the presence, direction, distance, and speed of aircraft, ships, vehicles, or other objects, by sending out pulses of radio waves and observing their reflections.
2
The equipment used in such a detection system.
3
Informal awareness or monitoring, as in 'on the radar' (being noticed or considered) or 'under the radar' (going unnoticed).
Examples
The ambitious intern's killer presentation finally got her on the CEO's radar.
He flew completely under the radar, smuggling snacks into the movie theater like a stealthy ninja.
My phone's low-battery warning pinged my neglectful-charging-habits radar way too late.
The meteorologist's storm radar lit up like a disco ball during the unexpected hail party.