radar meaning
EN
[ˈreɪdɑː(r)] WRadar
- Radar is an object-detection system that 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.
- 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 modern uses of radar are highly diverse, including air and terrestrial traffic control, radar astronomy, air-defense systems,
FR radar 
- NounPLradarsSUF-dar
- NU 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.
- NC A type of system using such method, differentiated by platform, configuration, frequency, power, and other technical attributes.
- NC An installation of such a system or of the transmitting and receiving apparatus.
- NC (figuratively) A superior ability to detect something.
- His sensitive radar for hidden alliances keeps him out of trouble.
- NU 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.
- VerbSGradarsPRradaringPT, PPradared
- More Examples
- Used in the Middle of Sentence
- The sonarman picks up the enemy, shoots the position to the radar controller sitting near him, and the radar controller, in a Tinker-to-Evers-to-Chance play, vectors a hovering helicopter to the spot.
- Used in the Ending of Sentence
- GET TALKED DOWN: When a pilot gets caught in weather, he may call the nearest tower for Ground Controlled Approach landing assistance, wherever the airport has GCA radar.
- Used in the Middle of Sentence
Definition of radar in English Dictionary
- Part-of-Speech Hierarchy
- Nouns
- Noun forms
- Plurals
- Irregular plurals
- Invariant nouns
- Invariant nouns
- Irregular plurals
- Noun plural forms
- Irregular plurals
- Invariant nouns
- Invariant nouns
- Irregular plurals
- Plurals
- Invariant nouns
- Irregular plurals
- Invariant nouns
- Invariant nouns
- Nouns with irregular plurals
- Invariant nouns
- Invariant nouns
- Countable nouns
- Singularia tantum
- Uncountable nouns
- Uncountable nouns
- Noun forms
- Verbs
- Nouns
- fr radar
- en radarscope
- en radars
- fr radars
- en radared
Source: Wiktionary
Grammatically, this word "radar" is a noun, more specifically, a noun form, an invariant noun, an irregular plural, a nouns with irregular plural, a countable noun and a singularia tantum. It's also a verb.