"bright-line rule" meaning in English

{
  "forms": [
    {
      "form": "bright-line rules",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "expansion": "bright-line rule (plural bright-line rules)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "80 20",
          "kind": "other",
          "name": "English entries with incorrect language header",
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          "source": "w+disamb"
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          "source": "w+disamb"
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      ],
      "glosses": [
        "A clear-cut, easy to make a decision."
      ],
      "id": "en-bright-line_rule-en-noun-80JtfMs3",
      "links": [
        [
          "clear-cut",
          "clear-cut"
        ],
        [
          "decision",
          "decision"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) A clear-cut, easy to make a decision."
      ],
      "tags": [
        "idiomatic"
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Law",
          "orig": "en:Law",
          "parents": [
            "Justice",
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A clearly defined rule or standard, composed of objective factors, which leaves little or no room for varying interpretation."
      ],
      "id": "en-bright-line_rule-en-noun-VG8qsnPD",
      "links": [
        [
          "law",
          "law#English"
        ],
        [
          "rule",
          "rule"
        ],
        [
          "standard",
          "standard"
        ],
        [
          "objective",
          "objective"
        ],
        [
          "factors",
          "factors"
        ],
        [
          "interpretation",
          "interpretation"
        ]
      ],
      "raw_glosses": [
        "(law) A clearly defined rule or standard, composed of objective factors, which leaves little or no room for varying interpretation."
      ],
      "related": [
        {
          "_dis1": "27 73",
          "word": "bright line"
        }
      ],
      "topics": [
        "law"
      ]
    }
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  "wikipedia": [
    "bright-line rule"
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  "word": "bright-line rule"
}

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    "English lemmas",
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    "English nouns",
    "Pages with 1 entry",
    "Pages with entries"
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  "forms": [
    {
      "form": "bright-line rules",
      "tags": [
        "plural"
      ]
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      "expansion": "bright-line rule (plural bright-line rules)",
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "bright line"
    }
  ],
  "senses": [
    {
      "categories": [
        "English idioms"
      ],
      "glosses": [
        "A clear-cut, easy to make a decision."
      ],
      "links": [
        [
          "clear-cut",
          "clear-cut"
        ],
        [
          "decision",
          "decision"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) A clear-cut, easy to make a decision."
      ],
      "tags": [
        "idiomatic"
      ]
    },
    {
      "categories": [
        "en:Law"
      ],
      "glosses": [
        "A clearly defined rule or standard, composed of objective factors, which leaves little or no room for varying interpretation."
      ],
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        ],
        [
          "rule",
          "rule"
        ],
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        ],
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          "objective"
        ],
        [
          "factors",
          "factors"
        ],
        [
          "interpretation",
          "interpretation"
        ]
      ],
      "raw_glosses": [
        "(law) A clearly defined rule or standard, composed of objective factors, which leaves little or no room for varying interpretation."
      ],
      "topics": [
        "law"
      ]
    }
  ],
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