roundabout noun definition in Controlling traffic topic from the Oxford Advanced Learner's Dictionary


 noun: Controlling traffic topic
(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.