Definitions for radarˈreɪ dɑr

This page provides all possible meanings and translations of the word radar

Random House Webster's College Dictionary

ra•darˈreɪ dɑr(n.)

  1. a device or system for determining the presence and location of an object by measuring the direction and timing of radio waves.

    Category: Electronics

  2. a means of awareness; perception:

    lobbyists working under the media's radar.

    Category: Common Vocabulary

Origin of radar:

1940–45, Amer.; ra(dio)d(etecting)a(nd)r(anging)

Princeton's WordNet

  1. radar, microwave radar, radio detection and ranging, radiolocation(noun)

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

Kernerman English Learner's Dictionary

  1. radar(noun)ˈreɪ dɑr

    a device or system that uses radio signals to determine the position of sth

    We can trace an aircraft using radar.; to disappear off the radar


  1. 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

  2. radar(Noun)

    A type of system using such method, differentiated by platform, configuration, frequency, power, and other technical attributes.

  3. radar(Noun)

    An installation of such a system or of the transmitting and receiving apparatus.

  4. radar(Noun)

    A superior ability to detect something.

    His sensitive radar for hidden alliances keeps him out of trouble.

  5. radar(Verb)

    To scan with radar, or as if with radar.

  6. Origin: Originally spelled RADAR; an acronym of .


  1. Radar

    Radar is an object detection system which uses radio waves to determine the range, altitude, direction, or speed of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. The radar dish or antenna transmits pulses of radio waves or microwaves which bounce off any object in their path. The object returns a tiny part of the wave's energy to a dish or antenna which is usually located at the same site as the transmitter. Radar was secretly developed by several nations before and during World War II. The term RADAR was coined in 1940 by the United States Navy as an acronym for RAdio Detection And Ranging. The term radar has since entered English and other languages as the common noun radar, losing all capitalization. The modern uses of radar are highly diverse, including air traffic control, radar astronomy, air-defense systems, antimissile systems; marine radars to locate landmarks and other ships; aircraft anticollision systems; ocean surveillance systems, outer space surveillance and rendezvous systems; meteorological precipitation monitoring; altimetry and flight control systems; guided missile target locating systems; and ground-penetrating radar for geological observations. High tech radar systems are associated with digital signal processing and are capable of extracting useful information from very high noise levels.

U.S. National Library of Medicine

  1. Radar

    A system using beamed and reflected radio signals to and from an object in such a way that range, bearing, and other characteristics of the object may be determined.

Translations for radar

Kernerman English Multilingual Dictionary


a method of showing the direction and distance of an object by means of radio waves which bounce off the object and return to their source.

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