"madrevieja" meaning in Spanish

{
  "forms": [
    {
      "form": "madreviejas",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "madrevieja f (plural madreviejas)",
      "name": "es-noun"
    }
  ],
  "hyphenation": [
    "ma‧dre‧vie‧ja"
  ],
  "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"
        }
      ],
      "glosses": [
        "a kind of wetland separated from a river"
      ],
      "id": "en-madrevieja-es-noun-WPeNUaZG",
      "links": [
        [
          "wetland",
          "wetland"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/madɾeˈbjexa/"
    },
    {
      "ipa": "[ma.ð̞ɾeˈβ̞je.xa]"
    },
    {
      "rhymes": "-exa"
    }
  ],
  "word": "madrevieja"
}

{
  "forms": [
    {
      "form": "madreviejas",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "madrevieja f (plural madreviejas)",
      "name": "es-noun"
    }
  ],
  "hyphenation": [
    "ma‧dre‧vie‧ja"
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Rhymes:Spanish/exa",
        "Rhymes:Spanish/exa/4 syllables",
        "Spanish 4-syllable words",
        "Spanish countable nouns",
        "Spanish entries with incorrect language header",
        "Spanish feminine nouns",
        "Spanish lemmas",
        "Spanish nouns",
        "Spanish terms with IPA pronunciation"
      ],
      "glosses": [
        "a kind of wetland separated from a river"
      ],
      "links": [
        [
          "wetland",
          "wetland"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/madɾeˈbjexa/"
    },
    {
      "ipa": "[ma.ð̞ɾeˈβ̞je.xa]"
    },
    {
      "rhymes": "-exa"
    }
  ],
  "word": "madrevieja"
}