Definition of "radar"

noun:
- A method of detecting distant objects and determining their position, velocity, or other characteristics by analysis of sent radio waves (usually microwaves) reflected from their surfaces.
  
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- A type of system using such method, differentiated by platform, configuration, frequency, power, and other technical attributes.
  
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- An installation of such a system or of the transmitting and receiving apparatus.
  
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- A superior ability to detect something.
  
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verb:
- To scan with radar, or as if with radar.
  
  from Wiktionary, Creative Commons Attribution/Share-Alike License