"C" meaning in Spanish

{
  "forms": [
    {
      "form": "c",
      "tags": [
        "lowercase"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "es",
        "10": "",
        "2": "letter",
        "3": "upper case",
        "4": "",
        "5": "",
        "6": "C",
        "7": "lower case",
        "8": "c",
        "9": "",
        "sc": ""
      },
      "expansion": "C (upper case, lower case c)",
      "name": "head"
    },
    {
      "args": {
        "lower": "c",
        "upper": "C"
      },
      "expansion": "C (upper case, lower case c)",
      "name": "es-letter"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "character",
  "senses": [
    {
      "categories": [
        {
          "_dis": "90 10",
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "The third letter of the Spanish alphabet, written in the Latin script."
      ],
      "id": "en-C-es-character-vL3HyFs6",
      "links": [
        [
          "letter",
          "letter"
        ],
        [
          "alphabet",
          "alphabet"
        ]
      ],
      "tags": [
        "letter",
        "uppercase"
      ]
    }
  ],
  "word": "C"
}

{
  "head_templates": [
    {
      "args": {
        "1": "es",
        "2": "nouns",
        "g": "m"
      },
      "expansion": "C m",
      "name": "head"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "K (knight)",
          "word": "caballo"
        }
      ],
      "categories": [
        {
          "kind": "topical",
          "langcode": "es",
          "name": "Chess",
          "orig": "es:Chess",
          "parents": [
            "Board games",
            "Tabletop games",
            "Games",
            "Recreation",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of caballo.; K (knight)"
      ],
      "id": "en-C-es-noun-HhPVm1gK",
      "links": [
        [
          "chess",
          "chess"
        ],
        [
          "caballo",
          "caballo#Spanish"
        ],
        [
          "K",
          "K"
        ],
        [
          "knight",
          "knight"
        ]
      ],
      "raw_glosses": [
        "(chess) Abbreviation of caballo.; K (knight)"
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "masculine"
      ],
      "topics": [
        "board-games",
        "chess",
        "games"
      ]
    }
  ],
  "word": "C"
}

{
  "categories": [
    "Spanish entries with incorrect language header",
    "Spanish lemmas",
    "Spanish letters",
    "Spanish masculine nouns",
    "Spanish nouns"
  ],
  "forms": [
    {
      "form": "c",
      "tags": [
        "lowercase"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "es",
        "10": "",
        "2": "letter",
        "3": "upper case",
        "4": "",
        "5": "",
        "6": "C",
        "7": "lower case",
        "8": "c",
        "9": "",
        "sc": ""
      },
      "expansion": "C (upper case, lower case c)",
      "name": "head"
    },
    {
      "args": {
        "lower": "c",
        "upper": "C"
      },
      "expansion": "C (upper case, lower case c)",
      "name": "es-letter"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "character",
  "senses": [
    {
      "glosses": [
        "The third letter of the Spanish alphabet, written in the Latin script."
      ],
      "links": [
        [
          "letter",
          "letter"
        ],
        [
          "alphabet",
          "alphabet"
        ]
      ],
      "tags": [
        "letter",
        "uppercase"
      ]
    }
  ],
  "word": "C"
}

{
  "categories": [
    "Spanish entries with incorrect language header",
    "Spanish lemmas",
    "Spanish letters",
    "Spanish masculine nouns",
    "Spanish nouns"
  ],
  "head_templates": [
    {
      "args": {
        "1": "es",
        "2": "nouns",
        "g": "m"
      },
      "expansion": "C m",
      "name": "head"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "K (knight)",
          "word": "caballo"
        }
      ],
      "categories": [
        "Spanish abbreviations",
        "es:Chess"
      ],
      "glosses": [
        "Abbreviation of caballo.; K (knight)"
      ],
      "links": [
        [
          "chess",
          "chess"
        ],
        [
          "caballo",
          "caballo#Spanish"
        ],
        [
          "K",
          "K"
        ],
        [
          "knight",
          "knight"
        ]
      ],
      "raw_glosses": [
        "(chess) Abbreviation of caballo.; K (knight)"
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "masculine"
      ],
      "topics": [
        "board-games",
        "chess",
        "games"
      ]
    }
  ],
  "word": "C"
}