First Known Use: 1941
Dictionary
radar
noun, ra·dar often attributive \ˈrā-ˌdär\
: a device that sends out radio waves for finding out the position and speed of a moving object (such as an airplane)
Full Definition of RADAR
1
: a device or system consisting usually of a synchronized radio transmitter and receiver that emits radio waves and processes their reflections for display and is used especially for detecting and locating objects (as aircraft) or surface features (as of a planet)
2
: range of notice <fell off the radar after losing their first three games>
See radar defined for English-language learners
See radar defined for kids
ADVERTISEMENT
Origin of RADAR
radio detecting and ranging
Rhymes with RADAR
Adar, Adzhar, afar, ajar, all-star, armoire, attar, bar car, bazaar, beaux arts, bête noire, beurre noir, Bihar, bizarre, boudoir, boxcar, boyar, Bronze Star, bulbar, Bulgar, bursar, bus bar, canard, cash bar, catarrh, Cathar, chair car, chukar, cigar, clochard, club car, coal tar, cougar, couloir, crossbar, crowbar, Dakar, daystar, debar, decare, devoir, dinar, disbar, Dog Star, drawbar, durbar, earthstar, Elgar, eschar, eyebar, feldspar, fern bar, film noir, five-star, fixed star, flatcar, fluorspar, four-star, fulmar, gaydar, gazar, guitar, Gunnar, Hagar, handcar, horsecar, hussar, Invar, Iyar, jaguar, Kádár, leaf scar, Lehár, lidar, Lifar, Loire, lounge car, lumbar, jack-tar, jowar, Khowar, lahar, lekvar, lodestar, Magyar, malar, memoir, Mylar, NASCAR, Navarre, nightjar, North Star, pace car, paillard, peignoir, pinch bar, Pindar, pine tar, pissoir, planar, plantar, polestar, pourboire, prowl car, pulsar, Qatar, qintar, quasar, railcar, raw bar, rebar, red star, roll bar, Safar, Samar, sandbar, scalar, scout car, Sennar, shofar, sidebar, sidecar, sirdar, sitar, slop jar, slot car, snack bar, sofar, solar, sonar, sports bar, sports car, stock car, streetcar, Svalbard, sway bar, tank car, T-bar, toolbar, town car, tramcar, trocar, unbar, volar, voussoir, Weimar
RADAR Defined for Kids
radar
noun ra·dar \ˈrā-ˌdär\
Definition of RADAR for Kids
: a radio device for detecting the position of things in the distance and the direction of moving objects (as distant airplanes or ships)
Learn More About RADAR
Browse
Next Word in the Dictionary: radar astronomyPrevious Word in the Dictionary: rad All Words Near: radar
ADVERTISEMENT
Seen & Heard
What made you want to look up radar? Please tell us where you read or heard it (including the quote, if possible).