radar
Electronics. a device for determining the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns.
a means or sense of awareness or perception: lobbyists working under the media's radar.
Origin of radar
1Other words from radar
- an·ti·ra·dar, noun, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use radar in a sentence
The system is truck-mounted and road-mobile, as are the big and conspicuous radars that stood next to it on display.
How China Will Track—and Kill—America’s Newest Stealth Jets | Bill Sweetman | December 2, 2014 | THE DAILY BEASTThe F-35 is susceptible to detection by radars operating in the VHF bands of the spectrum.
New U.S. Stealth Jet Can’t Hide From Russian Radar | Bill Sweetman | April 28, 2014 | THE DAILY BEASTBut the most serious may be that the JSF is not, in fact, stealthy in the eyes of a growing number of Russian and Chinese radars.
New U.S. Stealth Jet Can’t Hide From Russian Radar | Bill Sweetman | April 28, 2014 | THE DAILY BEASTThe S-300 deploys sophisticated radars, launch vehicles and missiles to shoot aircraft and even ballistic missiles out of the sky.
Russia’s Ace in the Hole: a Super-Missile It Can Sell to Iran | Eli Lake | April 8, 2014 | THE DAILY BEASTThis is the age of satellites and radars and Google Earth, of cellphone cameras (and cellphone towers) and IP addresses.
Lockley tried to get Vale back, to tell him that radars had verified his report and that it would be acted on by the military.
Operation Terror | William Fitzgerald JenkinsTwo radars reported tracking the thing down to a landing near you.
Operation Terror | William Fitzgerald JenkinsOf course radars spotted the Med Ship as an object, but nobody paid attention.
Pariah Planet | Murray LeinsterFor Rapid Dominance, radars and other active sensors must operate with low probability of intercept.
Shock and Awe | Harlan K. UllmanBaird listened, checking the orders against what the situation was as the radars saw it.
The Aliens | Murray Leinster
British Dictionary definitions for radar
/ (ˈreɪdɑː) /
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: Former name: radiolocation
the equipment used in such detection
Origin of radar
1Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for radar
[ rā′där ]
A method of detecting distant objects and determining their position, speed, material composition, or other characteristics by causing radio waves to be reflected from them and analyzing the reflected waves. The waves can be converted into images, as for use on weather maps.
The equipment used in such detecting. See also Doppler effect lidar sonar.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for radar
A method of finding the position and velocity of an object by bouncing a radio wave off it and analyzing the reflected wave. Radar is an acronym for radio detection and ranging.
Notes for radar
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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