If you go somewhere by a roundabout route, you do not go there by the shortest and quickest route.

If you do or say something in a roundabout way, you do not do or say it in a simple, clear, and direct way.

A roundabout is a circular structure in the road at a place where several roads meet. You drive around it until you come to the road that you want.

A roundabout at an amusement park is a large, circular mechanical device with seats, often in the shape of animals or cars, on which children sit and go around and around.

A roundabout in a park or school play area is a circular platform that children sit or stand on. People push the platform to make it spin round.