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| ra·dar [ ráy dr ] |
noun |
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| Definition: |
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1. object-locating system: a system that uses reflected radio waves to determine the presence, location, and speed of distant objects. The system has military, law-enforcement, and navigational applications. Examples of its uses include the locating of enemy aircraft or ships and the monitoring of vehicle speeds.
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2. object-locating equipment: the electronic equipment that transmits and receives high-frequency radio waves to detect, locate, and track distant objects
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| [Mid-20th century. Acronym <radio detection and ranging] |
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