"불문율" meaning in Korean

{
  "etymology_templates": [
    {
      "args": {
        "1": "不",
        "2": "not",
        "3": "文",
        "4": "written",
        "5": "律",
        "6": "rule"
      },
      "expansion": "Sino-Korean word from 不文律, from 不 (“not”) + 文 (“written”) + 律 (“rule”)",
      "name": "ko-etym-sino"
    }
  ],
  "etymology_text": "Sino-Korean word from 不文律, from 不 (“not”) + 文 (“written”) + 律 (“rule”).",
  "forms": [
    {
      "form": "bulmunnyul",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "不文律",
      "tags": [
        "hanja"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "hanja": "不文律",
        "rv": "bulmunnyul"
      },
      "expansion": "불문율 • (bulmunnyul) (hanja 不文律)",
      "name": "ko-noun"
    }
  ],
  "lang": "Korean",
  "lang_code": "ko",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Korean entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Korean terms with non-redundant manual transliterations",
          "parents": [
            "Terms with non-redundant manual transliterations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Korean terms with redundant script codes",
          "parents": [
            "Terms with redundant script codes",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Sino-Korean words",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "That you do not ask the teacher a question immediately before the end of class is a sort of unwritten rule in high school.",
          "roman": "Sueob-i kkeunnagi jikjeon-e seonsaengnim-kke jilmun-eul haji anneundaneun geos-eun godeunghakgyo-eseo iljong-ui bulmunnyurida.",
          "text": "수업이 끝나기 직전에 선생님께 질문을 하지 않는다는 것은 고등학교에서 일종의 불문율이다.",
          "type": "example"
        }
      ],
      "glosses": [
        "unwritten rule, unspoken rule"
      ],
      "id": "en-불문율-ko-noun-qPB2Aki8",
      "links": [
        [
          "unwritten rule",
          "unwritten rule"
        ],
        [
          "unspoken rule",
          "unspoken rule"
        ]
      ],
      "related": [
        {
          "roman": "gungnul",
          "word": "국룰"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[puɭmunɲuɭ]",
      "tags": [
        "SK-Standard",
        "Seoul"
      ]
    },
    {
      "hangeul": "불문뉼"
    },
    {
      "other": "[불문뉼]"
    }
  ],
  "word": "불문율"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "不",
        "2": "not",
        "3": "文",
        "4": "written",
        "5": "律",
        "6": "rule"
      },
      "expansion": "Sino-Korean word from 不文律, from 不 (“not”) + 文 (“written”) + 律 (“rule”)",
      "name": "ko-etym-sino"
    }
  ],
  "etymology_text": "Sino-Korean word from 不文律, from 不 (“not”) + 文 (“written”) + 律 (“rule”).",
  "forms": [
    {
      "form": "bulmunnyul",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "不文律",
      "tags": [
        "hanja"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "hanja": "不文律",
        "rv": "bulmunnyul"
      },
      "expansion": "불문율 • (bulmunnyul) (hanja 不文律)",
      "name": "ko-noun"
    }
  ],
  "lang": "Korean",
  "lang_code": "ko",
  "pos": "noun",
  "related": [
    {
      "roman": "gungnul",
      "word": "국룰"
    }
  ],
  "senses": [
    {
      "categories": [
        "Korean entries with incorrect language header",
        "Korean lemmas",
        "Korean nouns",
        "Korean terms with IPA pronunciation",
        "Korean terms with non-redundant manual transliterations",
        "Korean terms with redundant script codes",
        "Korean terms with usage examples",
        "Pages with 1 entry",
        "Pages with entries",
        "Sino-Korean words"
      ],
      "examples": [
        {
          "english": "That you do not ask the teacher a question immediately before the end of class is a sort of unwritten rule in high school.",
          "roman": "Sueob-i kkeunnagi jikjeon-e seonsaengnim-kke jilmun-eul haji anneundaneun geos-eun godeunghakgyo-eseo iljong-ui bulmunnyurida.",
          "text": "수업이 끝나기 직전에 선생님께 질문을 하지 않는다는 것은 고등학교에서 일종의 불문율이다.",
          "type": "example"
        }
      ],
      "glosses": [
        "unwritten rule, unspoken rule"
      ],
      "links": [
        [
          "unwritten rule",
          "unwritten rule"
        ],
        [
          "unspoken rule",
          "unspoken rule"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[puɭmunɲuɭ]",
      "tags": [
        "SK-Standard",
        "Seoul"
      ]
    },
    {
      "hangeul": "불문뉼"
    },
    {
      "other": "[불문뉼]"
    }
  ],
  "word": "불문율"
}