Definition of "radar" []

  • A method of detecting distant objects and determining their position, velocity, or other characteristics by analysis of very high frequency radio waves reflected from their surfaces. (noun)
  • The equipment used in such detection. (noun)
  • A method for detecting the position and velocity of a distant object, such as an aircraft. A narrow beam of extremely high-frequency radio pulses is transmitted and reflected by the object back to the transmitter, the signal being displayed on a radarscope. The direction of the reflected beam and the time between transmission and reception of a pulse determine the position of the object (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

  • The equipment used in such detection (noun) (c) HarperCollins Publishers Ltd 2016

Use "radar" in a sentence
  • "RADAR The term radar is an acronym derived from the words radio detection and ranging."
  • "I think so far he did great job for not being in the obvious, being under the radar is a way to play the game in survivor, too."
  • "This method of "radio detection and ranging" came to be known by the acronym radar, with the word's palindromic nature echoing the system's operating principle."