"matière grise" meaning in All languages combined

{
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "-"
      },
      "expansion": "matière grise f (uncountable)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "grey matter"
      ],
      "id": "en-matière_grise-fr-noun-tgx8sLhY",
      "links": [
        [
          "grey matter",
          "grey matter"
        ]
      ],
      "related": [
        {
          "word": "cellule grise"
        }
      ],
      "tags": [
        "feminine",
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ma.tjɛʁ ɡʁiz/"
    }
  ],
  "word": "matière grise"
}

{
  "head_templates": [
    {
      "args": {
        "1": "f",
        "2": "-"
      },
      "expansion": "matière grise f (uncountable)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "related": [
    {
      "word": "cellule grise"
    }
  ],
  "senses": [
    {
      "categories": [
        "French entries with incorrect language header",
        "French feminine nouns",
        "French lemmas",
        "French multiword terms",
        "French nouns",
        "French terms with IPA pronunciation",
        "French uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "grey matter"
      ],
      "links": [
        [
          "grey matter",
          "grey matter"
        ]
      ],
      "tags": [
        "feminine",
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ma.tjɛʁ ɡʁiz/"
    }
  ],
  "word": "matière grise"
}