"皇太子" meaning in Japanese

{
  "forms": [
    {
      "form": "皇太子 ^",
      "ruby": [
        [
          "皇",
          "こう"
        ],
        [
          "太",
          "たい"
        ],
        [
          "子",
          "し"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kōtaishi",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "kwautaisi",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "くわうたいし",
      "roman": "kwautaisi",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "こうたいし",
        "hhira": "くわうたいし"
      },
      "expansion": "皇(こう)太(たい)子(し) • (kōtaishi) ^(←くわうたいし (kwautaisi)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant alt parameters",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms read with on'yomi",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with 3 kanji",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with Nakadaka pitch accent (Tōkyō)",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with non-redundant non-automated sortkeys",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 4 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "ja",
          "name": "Monarchy",
          "orig": "ja:Monarchy",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "ja",
          "name": "People",
          "orig": "ja:People",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "crown prince"
      ],
      "id": "en-皇太子-ja-noun-vBD2MMf3",
      "links": [
        [
          "crown prince",
          "crown prince"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "other": "こーたいし"
    },
    {
      "note": "Kyōto",
      "other": "[kòótáꜜìshì]"
    },
    {
      "ipa": "[ko̞ːta̠iɕi]"
    }
  ],
  "word": "皇太子"
}

{
  "forms": [
    {
      "form": "皇太子 ^",
      "ruby": [
        [
          "皇",
          "こう"
        ],
        [
          "太",
          "たい"
        ],
        [
          "子",
          "し"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "kōtaishi",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "kwautaisi",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "くわうたいし",
      "roman": "kwautaisi",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "こうたいし",
        "hhira": "くわうたいし"
      },
      "expansion": "皇(こう)太(たい)子(し) • (kōtaishi) ^(←くわうたいし (kwautaisi)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant alt parameters",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms historically spelled with わ",
        "Japanese terms read with on'yomi",
        "Japanese terms spelled with first grade kanji",
        "Japanese terms spelled with second grade kanji",
        "Japanese terms spelled with sixth grade kanji",
        "Japanese terms spelled with 太 read as たい",
        "Japanese terms spelled with 子 read as し",
        "Japanese terms spelled with 皇 read as こう",
        "Japanese terms with 3 kanji",
        "Japanese terms with IPA pronunciation",
        "Japanese terms with IPA pronunciation with pitch accent",
        "Japanese terms with Nakadaka pitch accent (Tōkyō)",
        "Japanese terms with non-redundant non-automated sortkeys",
        "Japanese terms with redundant sortkeys",
        "Pages with 4 entries",
        "Pages with entries",
        "ja:Monarchy",
        "ja:People"
      ],
      "glosses": [
        "crown prince"
      ],
      "links": [
        [
          "crown prince",
          "crown prince"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "other": "こーたいし"
    },
    {
      "note": "Kyōto",
      "other": "[kòótáꜜìshì]"
    },
    {
      "ipa": "[ko̞ːta̠iɕi]"
    }
  ],
  "word": "皇太子"
}