1. a complete change in opinion, policy, or situation
2. a circular area where vehicles can turn around

Examples

• The company’s sudden turnabout on environmental policy surprised everyone.
• His turnabout from opponent to supporter was unexpected.
• The politician’s turnabout on the issue cost him votes.
• We used the turnabout at the end of the street to head back home.
• The narrow road had a small turnabout for emergency vehicles.
• Her complete turnabout in attitude made reconciliation possible.