Oxford Advanced American Dictionary

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

roundabout

noun
roundabout pronunciation English ˈraʊndəbaʊt roundabout pronunciation American ˈraʊndəbaʊt
 
(British English)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 directionAt the roundabout, take the second exit.When entering a roundabout, give way to any traffic already on it. see also mini-roundabout2 (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 it3 (British English) = merry-go-round (1)
Idioms
see
swings and roundabouts at swing noun