[Elamur Dictionary](https://md.dictionary.elamur.ai/free/en/) · [this page in HTML](https://dictionary.elamur.ai/free/en/english/radar/)

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# radar

noun (radar — uncountable; a radar)

«radar» in the English dictionary: everyday — its meanings, how the lessons use it, and examples, each with its tree on Mova.

## Everyday

1. Radar is a system that sends out radio waves and catches them when they bounce back, to find where planes, ships, storms or cars are and how fast they move. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/radar/#m1)
2. «On someone's radar» means they know about it or are paying attention to it. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/radar/#m2)

### In the lessons

In science radar shows how waves reflect; weather radar maps show rain clouds; police use radar to catch speeding cars; airports use it to guide planes. Bats and dolphins use a similar idea with sound (echolocation). Phrases: «on the radar», «under the radar», «weather radar», «radar screen».

### Examples

- Air traffic controllers watch planes on the radar. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/radar/#x1)
- The weather radar shows rain coming this afternoon. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/radar/#x2)
- The police used radar to check the cars' speed. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/radar/#x3)
- The ship's radar spotted an iceberg. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/radar/#x4)
- Bats find insects in a way a bit like radar, using sound. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/radar/#x5)
- The test is not on my radar yet — when is it? [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/radar/#x6)

### Note

Usually uncountable («radar»), sometimes «a radar» for one machine. It reads the same backwards: r-a-d-a-r (a palindrome). It was first a short form of «RAdio Detection And Ranging». «Under the radar» means not noticed.

## On Mova

- [Trees and pragmatics of «radar» in the school dictionary](https://mova.elamur.ai/free/en/corpora/dictionaries/school/R/radar/): every meaning and example parsed by Mova, with its dependency tree and frames.
- [«radar» in the school dictionary](https://mova.elamur.ai/free/en/dictionaries/school/w/radar.html) on Mova free.