"0-0" meaning in All languages combined

{
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol"
      },
      "expansion": "0-0",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "mul",
          "name": "Chess",
          "orig": "mul:Chess",
          "parents": [
            "Board games",
            "Tabletop games",
            "Games",
            "Recreation",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "kingside castling"
      ],
      "id": "en-0-0-mul-symbol-QZDqNnes",
      "links": [
        [
          "chess",
          "chess"
        ],
        [
          "kingside",
          "kingside"
        ],
        [
          "castling",
          "castling"
        ]
      ],
      "raw_glosses": [
        "(chess) kingside castling"
      ],
      "related": [
        {
          "word": "0-0-0"
        }
      ],
      "topics": [
        "board-games",
        "chess",
        "games"
      ]
    }
  ],
  "word": "0-0"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "0-0 (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English reduplicated coordinated pairs",
          "parents": [
            "Reduplicated coordinated pairs",
            "Coordinated pairs",
            "Reduplications",
            "Terms by etymology"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Aviation",
          "orig": "en:Aviation",
          "parents": [
            "Aeronautics",
            "Transport",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "zero-zero, a term meaning no ceiling and no visibility"
      ],
      "id": "en-0-0-en-adj-vkbG9qKQ",
      "links": [
        [
          "aviation",
          "aviation"
        ]
      ],
      "raw_glosses": [
        "(aviation) zero-zero, a term meaning no ceiling and no visibility"
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "aeronautics",
        "aerospace",
        "aviation",
        "business",
        "engineering",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "0-0"
}

{
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "0-0 (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English reduplicated coordinated pairs",
        "English terms spelled with numbers",
        "English uncomparable adjectives",
        "English words without vowels",
        "en:Aviation"
      ],
      "glosses": [
        "zero-zero, a term meaning no ceiling and no visibility"
      ],
      "links": [
        [
          "aviation",
          "aviation"
        ]
      ],
      "raw_glosses": [
        "(aviation) zero-zero, a term meaning no ceiling and no visibility"
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "aeronautics",
        "aerospace",
        "aviation",
        "business",
        "engineering",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "0-0"
}

{
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "symbol"
      },
      "expansion": "0-0",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "symbol",
  "related": [
    {
      "word": "0-0-0"
    }
  ],
  "senses": [
    {
      "categories": [
        "Translingual entries with incorrect language header",
        "Translingual lemmas",
        "Translingual symbols",
        "Translingual terms spelled with numbers",
        "mul:Chess"
      ],
      "glosses": [
        "kingside castling"
      ],
      "links": [
        [
          "chess",
          "chess"
        ],
        [
          "kingside",
          "kingside"
        ],
        [
          "castling",
          "castling"
        ]
      ],
      "raw_glosses": [
        "(chess) kingside castling"
      ],
      "topics": [
        "board-games",
        "chess",
        "games"
      ]
    }
  ],
  "word": "0-0"
}