"Matrioshka brain" meaning in English

{
  "forms": [
    {
      "form": "Matrioshka brains",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "Matrioshka brain"
      },
      "expansion": "Matrioshka brain (plural Matrioshka brains)",
      "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"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Computing",
          "orig": "en:Computing",
          "parents": [
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Megastructures",
          "orig": "en:Megastructures",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A hypothetical megastructure of immense computational capacity powered by a Dyson sphere."
      ],
      "id": "en-Matrioshka_brain-en-noun-OCJlSJng",
      "links": [
        [
          "hypothetical",
          "hypothetical"
        ],
        [
          "megastructure",
          "megastructure"
        ],
        [
          "immense",
          "immense"
        ],
        [
          "computational",
          "computational"
        ],
        [
          "capacity",
          "capacity"
        ],
        [
          "Dyson sphere",
          "Dyson sphere"
        ]
      ]
    }
  ],
  "word": "Matrioshka brain"
}

{
  "forms": [
    {
      "form": "Matrioshka brains",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "head": "Matrioshka brain"
      },
      "expansion": "Matrioshka brain (plural Matrioshka brains)",
      "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",
        "en:Computing",
        "en:Megastructures"
      ],
      "glosses": [
        "A hypothetical megastructure of immense computational capacity powered by a Dyson sphere."
      ],
      "links": [
        [
          "hypothetical",
          "hypothetical"
        ],
        [
          "megastructure",
          "megastructure"
        ],
        [
          "immense",
          "immense"
        ],
        [
          "computational",
          "computational"
        ],
        [
          "capacity",
          "capacity"
        ],
        [
          "Dyson sphere",
          "Dyson sphere"
        ]
      ]
    }
  ],
  "word": "Matrioshka brain"
}