roundabout
n. countable B1 Intermediate US //ˈɹaʊndəˌbaʊt// UK //ɹˈaʊndɐbˌaʊt// round·about
n. a circular place where several roads meet. You drive around a center island until you reach the road you want to take.
n. a circular intersection where traffic moves in one direction around a central island. Common in British English; often referred to as a 'traffic circle' in North American contexts.
Take the second exit at the roundabout.
The new roundabout has significantly reduced the number of accidents at the busy intersection.
Navigating the multi-lane roundabout requires constant attention to lane markings and the signaling of other drivers to ensure a safe exit.
From round + about [from early 20th c.].
Usage
Commonly used with the verb 'take' when giving directions ('take the third exit').