1. a roadside inspection point where police or authorities stop vehicles to check documents, safety compliance, or sobriety
Usage: chiefly Canadian and Australian English; also called a checkpoint or sobriety checkpoint in other regions

Examples

• The police set up a checkstop on the highway to catch impaired drivers.
• Drivers were delayed at the checkstop while officers verified their licenses.
• The checkstop was established to ensure vehicle safety before the holiday weekend.
• She was nervous passing through the checkstop, even though she had done nothing wrong.
• Random checkstops help reduce drunk driving on busy roads.