"blackline" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "black",
        "3": "line"
      },
      "expansion": "black + line",
      "name": "compound"
    }
  ],
  "etymology_text": "From black + line; compare redline, greenline.",
  "forms": [
    {
      "form": "blacklines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "blackline (plural blacklines)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "36 27 37",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "37 32 30",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "33 33 34",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A document indicating the differences between two versions of another document."
      ],
      "id": "en-blackline-en-noun-bfbQ8sY3",
      "links": [
        [
          "document",
          "document"
        ]
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Firefighting",
          "orig": "en:Firefighting",
          "parents": [
            "Emergency services",
            "Fire",
            "Public safety",
            "Combustion",
            "Light sources",
            "Public administration",
            "Security",
            "Chemical processes",
            "Light",
            "Government",
            "Society",
            "Nature",
            "Energy",
            "Politics",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "36 27 37",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "37 32 30",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "33 33 34",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "2011, Colorado Outdoors, volumes 49-50, page 11:",
          "text": "A second squad uses drip torches to begin burning a 15- to 20-foot barrier or “blackline” inside the wetline.",
          "type": "quote"
        },
        {
          "ref": "1991, Rangeland Technology Equipment Council Annual Report, USDA Forest Service:",
          "text": "The helicopter is used to burn blacklines when the relative humidity is above 50%, temperature is below 50 degrees F, and wind speed is less than 6 mph.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A line of deliberately burned material created to stop the advance of a larger fire."
      ],
      "id": "en-blackline-en-noun-5yb~mzNq",
      "links": [
        [
          "firefighting",
          "firefighting"
        ],
        [
          "burn",
          "burn"
        ]
      ],
      "raw_glosses": [
        "(firefighting) A line of deliberately burned material created to stop the advance of a larger fire."
      ],
      "topics": [
        "firefighting",
        "government"
      ]
    }
  ],
  "word": "blackline"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "black",
        "3": "line"
      },
      "expansion": "black + line",
      "name": "compound"
    }
  ],
  "etymology_text": "From black + line; compare redline, greenline.",
  "forms": [
    {
      "form": "blacklines",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "blacklining",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "blacklined",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "blacklined",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "blackline (third-person singular simple present blacklines, present participle blacklining, simple past and past participle blacklined)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "_dis": "36 27 37",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "37 32 30",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "33 33 34",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "To compare versions of (a document) by this method."
      ],
      "id": "en-blackline-en-verb-P2gwhztr",
      "raw_glosses": [
        "(transitive) To compare versions of (a document) by this method."
      ],
      "related": [
        {
          "word": "blackline tilefish"
        }
      ],
      "tags": [
        "transitive"
      ]
    }
  ],
  "word": "blackline"
}

{
  "categories": [
    "English compound terms",
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English verbs",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "black",
        "3": "line"
      },
      "expansion": "black + line",
      "name": "compound"
    }
  ],
  "etymology_text": "From black + line; compare redline, greenline.",
  "forms": [
    {
      "form": "blacklines",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "blackline (plural blacklines)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "glosses": [
        "A document indicating the differences between two versions of another document."
      ],
      "links": [
        [
          "document",
          "document"
        ]
      ]
    },
    {
      "categories": [
        "English terms with quotations",
        "en:Firefighting"
      ],
      "examples": [
        {
          "ref": "2011, Colorado Outdoors, volumes 49-50, page 11:",
          "text": "A second squad uses drip torches to begin burning a 15- to 20-foot barrier or “blackline” inside the wetline.",
          "type": "quote"
        },
        {
          "ref": "1991, Rangeland Technology Equipment Council Annual Report, USDA Forest Service:",
          "text": "The helicopter is used to burn blacklines when the relative humidity is above 50%, temperature is below 50 degrees F, and wind speed is less than 6 mph.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A line of deliberately burned material created to stop the advance of a larger fire."
      ],
      "links": [
        [
          "firefighting",
          "firefighting"
        ],
        [
          "burn",
          "burn"
        ]
      ],
      "raw_glosses": [
        "(firefighting) A line of deliberately burned material created to stop the advance of a larger fire."
      ],
      "topics": [
        "firefighting",
        "government"
      ]
    }
  ],
  "word": "blackline"
}

{
  "categories": [
    "English compound terms",
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English verbs",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "black",
        "3": "line"
      },
      "expansion": "black + line",
      "name": "compound"
    }
  ],
  "etymology_text": "From black + line; compare redline, greenline.",
  "forms": [
    {
      "form": "blacklines",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "blacklining",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "blacklined",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "blacklined",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "blackline (third-person singular simple present blacklines, present participle blacklining, simple past and past participle blacklined)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "related": [
    {
      "word": "blackline tilefish"
    }
  ],
  "senses": [
    {
      "categories": [
        "English transitive verbs"
      ],
      "glosses": [
        "To compare versions of (a document) by this method."
      ],
      "raw_glosses": [
        "(transitive) To compare versions of (a document) by this method."
      ],
      "tags": [
        "transitive"
      ]
    }
  ],
  "word": "blackline"
}