Radar (noun)

1. A system that uses radio waves to detect the presence, position, or movement of objects, such as aircraft or ships.
2. An electronic device that emits radio waves and analyzes their reflections to detect and locate objects.

Origin:

An acronym for radio detection and ranging.

Examples:

1. The radar showed a storm approaching.
2. The radar system was used to track the aircraft.
3. The ship's radar detected the approaching vessel.
4. Radar is used to detect and locate objects at a distance.
5. Radar technology is used in many industries including weather forecasting, aviation, and military.