1. to officially remove something from active service or use

Examples

• The navy will decommission the old aircraft carrier next year.
• The power plant was decommissioned after forty years of operation.
• City officials voted to decommission the aging fire truck.
• The military base was decommissioned and converted into a park.
• They plan to decommission the nuclear reactor by 2025.
• The company decided to decommission its outdated computer system.