"decommissioned" meaning in English

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          "ref": "2021 November 17, Andrew Mourant, “Okehampton: a new dawn for Dartmoor”, in RAIL, number 944, page 43:",
          "text": "That project would mean reinstating 5½ miles of decommissioned line between Tavistock, where a new single-platform railway station would be built alongside the 750-home housing estate currently under construction, and Bere Alston.",
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        "simple past and past participle of decommission"
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