"masked facies" meaning in English

{
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      "expansion": "masked facies",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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          "kind": "topical",
          "langcode": "en",
          "name": "Medicine",
          "orig": "en:Medicine",
          "parents": [
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Masklike facial expression, often noted in Parkinson's disease."
      ],
      "id": "en-masked_facies-en-noun-6~0m89yP",
      "links": [
        [
          "medicine",
          "medicine"
        ],
        [
          "Masklike",
          "masklike#English"
        ],
        [
          "Parkinson's disease",
          "Parkinson's disease"
        ]
      ],
      "raw_glosses": [
        "(medicine) Masklike facial expression, often noted in Parkinson's disease."
      ],
      "synonyms": [
        {
          "word": "parkinsonian facies"
        }
      ],
      "topics": [
        "medicine",
        "sciences"
      ],
      "translations": [
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "maskopodóbnoje licó",
          "sense": "immobile facial expression",
          "tags": [
            "neuter"
          ],
          "word": "маскоподо́бное лицо́"
        }
      ]
    }
  ],
  "word": "masked facies"
}

{
  "head_templates": [
    {
      "args": {
        "1": "?"
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      "expansion": "masked facies",
      "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",
        "English nouns with unknown or uncertain plurals",
        "en:Medicine"
      ],
      "glosses": [
        "Masklike facial expression, often noted in Parkinson's disease."
      ],
      "links": [
        [
          "medicine",
          "medicine"
        ],
        [
          "Masklike",
          "masklike#English"
        ],
        [
          "Parkinson's disease",
          "Parkinson's disease"
        ]
      ],
      "raw_glosses": [
        "(medicine) Masklike facial expression, often noted in Parkinson's disease."
      ],
      "topics": [
        "medicine",
        "sciences"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "parkinsonian facies"
    }
  ],
  "translations": [
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "maskopodóbnoje licó",
      "sense": "immobile facial expression",
      "tags": [
        "neuter"
      ],
      "word": "маскоподо́бное лицо́"
    }
  ],
  "word": "masked facies"
}