radar
noun /ˈreɪdɑː(r)/
/ˈreɪdɑːr/
[uncountable]Idioms - a system that uses radio waves to find the position and movement of objects, for example planes and ships, when they cannot be seen
- They located the ship by radar.
- a radar screen
Extra ExamplesTopics Transport by waterc1, Transport by airc1- The aircraft suddenly went off the radar.
- The submarine is impossible to detect on radar.
- navigation by radar
Oxford Collocations Dictionaryadjective- enemy
- police
- airborne
- …
- be equipped with
- operator
- station
- system
- …
- by radar
- on radar
- off the radar
- on the radar
Word Origin1940s: from ra(dio) d(etection) a(nd) r(anging).
Idioms
below/under the radar
- used to say that people are not aware of something
- Experts say a lot of corporate crime stays under the radar.
- The conflict has slipped below the radar of the mass media.
on/off the radar (screen)
- used to say that people’s attention is on or not on something
- The issue of terrorism is back on the radar screen.
- Since the scandal broke, all other issues seem to have disappeared off the radar screen as far as the media is concerned.