"こうこん" meaning in Japanese

{
  "forms": [
    {
      "form": "kōkon",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "こうこん • (kōkon)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "黄昏: dusk"
      ],
      "id": "en-こうこん-ja-noun-pZnf3fI2",
      "links": [
        [
          "黄昏",
          "黄昏#Japanese"
        ],
        [
          "dusk",
          "dusk"
        ]
      ]
    },
    {
      "categories": [
        {
          "_dis": "11 89",
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "9 91",
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "13 87",
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "後昆: posterity"
      ],
      "id": "en-こうこん-ja-noun-h4l59rEg",
      "links": [
        [
          "後昆",
          "後昆#Japanese"
        ],
        [
          "posterity",
          "posterity"
        ]
      ]
    }
  ],
  "word": "こうこん"
}

{
  "categories": [
    "Japanese entries with incorrect language header",
    "Japanese hiragana",
    "Japanese lemmas",
    "Japanese links with redundant wikilinks",
    "Japanese nouns",
    "Japanese terms with redundant sortkeys"
  ],
  "forms": [
    {
      "form": "kōkon",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "こうこん • (kōkon)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "黄昏: dusk"
      ],
      "links": [
        [
          "黄昏",
          "黄昏#Japanese"
        ],
        [
          "dusk",
          "dusk"
        ]
      ]
    },
    {
      "glosses": [
        "後昆: posterity"
      ],
      "links": [
        [
          "後昆",
          "後昆#Japanese"
        ],
        [
          "posterity",
          "posterity"
        ]
      ]
    }
  ],
  "word": "こうこん"
}

{
  "called_from": "parser/1336",
  "msg": "no corresponding start tag found for </span>",
  "path": [
    "こうこん"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "こうこん",
  "trace": ""
}