"Rust Belt" meaning in English

{
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      "args": {
        "head": "Rust Belt"
      },
      "expansion": "Rust Belt",
      "name": "en-proper noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
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        {
          "kind": "place",
          "langcode": "en",
          "name": "Regions of the United States",
          "orig": "en:Regions of the United States",
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      "glosses": [
        "A region straddling the Northeastern and East North Central United States that has undergone economic decline and population loss due to the shrinking of its once powerful industrial sector."
      ],
      "id": "en-Rust_Belt-en-name-wkKfBj3X",
      "links": [
        [
          "region",
          "region"
        ],
        [
          "United States",
          "United States"
        ],
        [
          "economic",
          "economic"
        ],
        [
          "decline",
          "decline"
        ],
        [
          "population",
          "population"
        ],
        [
          "loss",
          "loss"
        ],
        [
          "industrial",
          "industrial"
        ]
      ],
      "raw_glosses": [
        "(informal) A region straddling the Northeastern and East North Central United States that has undergone economic decline and population loss due to the shrinking of its once powerful industrial sector."
      ],
      "synonyms": [
        {
          "word": "Rustbelt"
        }
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "word": "Rust Belt"
}

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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
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      ],
      "glosses": [
        "A region straddling the Northeastern and East North Central United States that has undergone economic decline and population loss due to the shrinking of its once powerful industrial sector."
      ],
      "links": [
        [
          "region",
          "region"
        ],
        [
          "United States",
          "United States"
        ],
        [
          "economic",
          "economic"
        ],
        [
          "decline",
          "decline"
        ],
        [
          "population",
          "population"
        ],
        [
          "loss",
          "loss"
        ],
        [
          "industrial",
          "industrial"
        ]
      ],
      "raw_glosses": [
        "(informal) A region straddling the Northeastern and East North Central United States that has undergone economic decline and population loss due to the shrinking of its once powerful industrial sector."
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "Rustbelt"
    }
  ],
  "word": "Rust Belt"
}