decommissionde·com·mis·sion /ˌdiːkəˈmɪʃən/ verb [transitiveT] to destroy a factory, POWER STATION, or other industrial building that has closed down, and to remove anything from it that might be harmful or dangerous25 of the mine’s 260 full-time employees will be kept on to decommission the property.
The two nuclear power plants are due to be decommissioned in 2045.
—decommission noun [countableC, uncountableU]the decommission of oil refineries