1. the action of fastening something with a lock
2. a mechanism or system that prevents movement or operation

1. designed to fasten or secure with a lock

Examples

• The locking of the front door is automatic at 10 PM.
• She heard the locking mechanism click into place.
• The locking system prevents unauthorized access to the building.
• He installed a locking cabinet for important documents.
• The locking feature on the phone keeps children from making calls.
• The locking wheels on the cart prevent it from rolling away.
• After locking the car, she checked the handle twice.