Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. 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.
  • n. The equipment used in such detection.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. 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
  • n. A type of system using such method, differentiated by platform, configuration, frequency, power, and other technical attributes.
  • n. An installation of such a system or of the transmitting and receiving apparatus.
  • n. A superior ability to detect something.
  • v. To scan with radar, or as if with radar.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects

Etymologies

ra(dio) d(etecting) a(nd) r(anging).
(American Heritage® Dictionary of the English Language, Fourth Edition)
Originally spelled RADAR; an acronym of radio detection and ranging. (Wiktionary)

Examples

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.

  • RAdio Detection And Ranging

    February 28, 2007

  • Why do I like it? Because it's a palindrome! That's why!

    December 1, 2006