"hill chain" meaning in English

{
  "forms": [
    {
      "form": "hill chains",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "hill chain (plural hill chains)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "An elongated line of hills that usually includes a succession of more or less prominent hilltops, domed summits or kuppen, hill ridges and saddles and which, together with its associated lateral ridges and branches, may form a complex topographic structure."
      ],
      "id": "en-hill_chain-en-noun-dpyIvdaT",
      "links": [
        [
          "hills",
          "hills"
        ],
        [
          "kuppen",
          "kuppen"
        ],
        [
          "hill ridges",
          "ridge"
        ],
        [
          "saddles",
          "saddles"
        ],
        [
          "topographic",
          "topographic"
        ]
      ],
      "raw_glosses": [
        "(countable) An elongated line of hills that usually includes a succession of more or less prominent hilltops, domed summits or kuppen, hill ridges and saddles and which, together with its associated lateral ridges and branches, may form a complex topographic structure."
      ],
      "tags": [
        "countable"
      ],
      "wikipedia": [
        "hill chain"
      ]
    }
  ],
  "word": "hill chain"
}

{
  "forms": [
    {
      "form": "hill chains",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "hill chain (plural hill chains)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns"
      ],
      "glosses": [
        "An elongated line of hills that usually includes a succession of more or less prominent hilltops, domed summits or kuppen, hill ridges and saddles and which, together with its associated lateral ridges and branches, may form a complex topographic structure."
      ],
      "links": [
        [
          "hills",
          "hills"
        ],
        [
          "kuppen",
          "kuppen"
        ],
        [
          "hill ridges",
          "ridge"
        ],
        [
          "saddles",
          "saddles"
        ],
        [
          "topographic",
          "topographic"
        ]
      ],
      "raw_glosses": [
        "(countable) An elongated line of hills that usually includes a succession of more or less prominent hilltops, domed summits or kuppen, hill ridges and saddles and which, together with its associated lateral ridges and branches, may form a complex topographic structure."
      ],
      "tags": [
        "countable"
      ],
      "wikipedia": [
        "hill chain"
      ]
    }
  ],
  "word": "hill chain"
}