"alta montaña" meaning in Spanish

{
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "-"
      },
      "expansion": "alta montaña f (uncountable)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "place",
          "langcode": "es",
          "name": "Landforms",
          "orig": "es:Landforms",
          "parents": [
            "Earth",
            "Places",
            "Nature",
            "Names",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Fundamental",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "high-altitude mountain"
      ],
      "id": "en-alta_montaña-es-noun-BVwFkRLL",
      "tags": [
        "feminine",
        "uncountable"
      ]
    }
  ],
  "word": "alta montaña"
}

{
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "-"
      },
      "expansion": "alta montaña f (uncountable)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Spanish entries with incorrect language header",
        "Spanish feminine nouns",
        "Spanish lemmas",
        "Spanish multiword terms",
        "Spanish nouns",
        "Spanish uncountable nouns",
        "es:Landforms"
      ],
      "glosses": [
        "high-altitude mountain"
      ],
      "tags": [
        "feminine",
        "uncountable"
      ]
    }
  ],
  "word": "alta montaña"
}