1. to disconnect or separate two things that were joined together
2. to disconnect railroad cars from each other or from a locomotive
Usage: railroad terminology

Examples

• The engineer will uncouple the last three cars from the train.
• Please uncouple the trailer from the truck before parking.
• The mechanic had to uncouple the engine from the transmission.
• Workers uncoupled the damaged car and left it on the siding.
• Make sure to uncouple the hose before moving the equipment.
• The automatic system will uncouple the cars if there’s an emergency.