1. circular intersections where traffic flows around a central island
Usage: British English; called traffic circles or rotaries in American English
2. merry-go-rounds or playground equipment that children ride by spinning around
Usage: British English

Examples

• The new roundabouts have reduced traffic accidents at busy intersections.
• Drivers must yield to traffic already in the roundabout.
• Children played on the roundabouts at the local playground.
• The city installed several roundabouts to improve traffic flow.
• She pushed the roundabout to make it spin faster for the kids.
• European cities commonly use roundabouts instead of traffic lights.
• The playground had swings, slides, and two small roundabouts.