Definition of roundabout noun from the Oxford Advanced Learner's Dictionary

     

    roundabout

     noun
    noun
    BrE BrE//ˈraʊndəbaʊt//
     
    ; NAmE NAmE//ˈraʊndəbaʊt//
     
    (British English) Controlling traffic
     
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  1. 1(North American English traffic circle, rotary) a place where two or more roads meet, forming a circle that all traffic must go around in the same direction At the roundabout, take the second exit. When entering a roundabout, give way to any traffic already on it. Leave the roundabout at the second exit. There was a lot of traffic on the roundabout. see also mini-roundabout Wordfinderbypass, carriageway, diversion, hard shoulder, lane, lay-by, motorway, road, roundabout, signpost See related entries: Controlling traffic
  2. 2(North American English merry-go-round) a round platform for children to play on in a park, etc. that is pushed round while the children are sitting on it
  3. 3(British English) = merry-go-round (1)
  4. Idioms (British English, informal) used to say that there are advantages and disadvantages whatever decision you make If you earn more, you pay more in tax, so it's all swings and roundabouts. What you gain on the swings you may lose on the roundabouts.