"一男" meaning in 日本語

{
  "categories": [
    {
      "kind": "other",
      "name": "日本語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "日本語 名詞",
      "parents": [],
      "source": "w"
    }
  ],
  "forms": [
    {
      "form": "いちなん"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "related": [
    {
      "word": "一女"
    },
    {
      "word": "二男"
    },
    {
      "word": "三男"
    },
    {
      "word": "四男"
    },
    {
      "word": "五男"
    },
    {
      "word": "六男"
    },
    {
      "word": "七男"
    },
    {
      "word": "八男"
    },
    {
      "word": "九男"
    },
    {
      "word": "十男"
    }
  ],
  "senses": [
    {
      "glosses": [
        "一人の男子。"
      ],
      "id": "ja-一男-ja-noun-1kRBmOac"
    },
    {
      "glosses": [
        "兄弟のうち、最初に生まれた男。長男。"
      ],
      "id": "ja-一男-ja-noun-yxoGBpzL"
    }
  ],
  "word": "一男"
}

{
  "categories": [
    "日本語",
    "日本語 名詞"
  ],
  "forms": [
    {
      "form": "いちなん"
    }
  ],
  "lang": "日本語",
  "lang_code": "ja",
  "pos": "noun",
  "pos_title": "名詞",
  "related": [
    {
      "word": "一女"
    },
    {
      "word": "二男"
    },
    {
      "word": "三男"
    },
    {
      "word": "四男"
    },
    {
      "word": "五男"
    },
    {
      "word": "六男"
    },
    {
      "word": "七男"
    },
    {
      "word": "八男"
    },
    {
      "word": "九男"
    },
    {
      "word": "十男"
    }
  ],
  "senses": [
    {
      "glosses": [
        "一人の男子。"
      ]
    },
    {
      "glosses": [
        "兄弟のうち、最初に生まれた男。長男。"
      ]
    }
  ],
  "word": "一男"
}