radar

Pronunciation: /ˈɹeɪdɑː/

The English word “radar” has 7 meanings listed here.

noun

In full primary radar: a method of detecting a distant object and determining its position, velocity, or other characteristics by analysing radio waves (usually microwaves) which are sent towards the object and which reflect off its surfaces; also, the field of study of this method.
In full secondary radar: a method of detecting a distant object and determining its position, velocity, or other characteristics by analysing signals transmitted by the object in response to radio waves sent towards the object.
Often preceded by a descriptive word: a system using one of the above detection methods, differentiated by configuration or platform, frequency, power, and other technical attributes.
An installation of the apparatus for operating one of the above detection systems.
Often preceded by a descriptive word: a natural (for example, in an animal such as a bat) or human-made detection method based on the analysis of reflected signals other than radio waves, as light waves or sound waves; (countable) an instance of this.
A superior ability to detect something; an awareness, an intuition.

To use a radar apparatus (noun senses 1, 1.1, or 2) on (someone or something); to scan (someone or something) with, or as if with, radar.

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.