"plumb line" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "enm",
        "3": "plumblyne"
      },
      "expansion": "Middle English plumblyne",
      "name": "inh"
    },
    {
      "args": {
        "1": "en",
        "2": "plumb",
        "3": "line"
      },
      "expansion": "plumb + line",
      "name": "com"
    }
  ],
  "etymology_text": "From Middle English plumblyne, equivalent to plumb + line.",
  "forms": [
    {
      "form": "plumb lines",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "plumbline",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "plumb line (plural plumb lines)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "78 22",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "84 16",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "75 25",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "92 8",
          "kind": "topical",
          "langcode": "en",
          "name": "Tools",
          "orig": "en:Tools",
          "parents": [
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A cord with a weight attached, used to produce a vertical line; a plummet."
      ],
      "id": "en-plumb_line-en-noun-ue74Rbxf",
      "links": [
        [
          "cord",
          "cord"
        ],
        [
          "weight",
          "weight"
        ],
        [
          "vertical",
          "vertical"
        ],
        [
          "plummet",
          "plummet"
        ]
      ],
      "related": [
        {
          "_dis1": "64 36",
          "word": "plumb"
        },
        {
          "_dis1": "64 36",
          "word": "plummet"
        },
        {
          "_dis1": "64 36",
          "word": "plumb bob"
        },
        {
          "_dis1": "64 36",
          "tags": [
            "verb"
          ],
          "word": "plumb-line"
        }
      ]
    },
    {
      "glosses": [
        "Any vertical reference line."
      ],
      "id": "en-plumb_line-en-noun-oJNdnQIn",
      "links": [
        [
          "reference",
          "reference"
        ]
      ]
    }
  ],
  "word": "plumb line"
}

{
  "categories": [
    "English compound terms",
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English terms derived from Middle English",
    "English terms inherited from Middle English",
    "Pages with 1 entry",
    "Pages with entries",
    "en:Tools"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "enm",
        "3": "plumblyne"
      },
      "expansion": "Middle English plumblyne",
      "name": "inh"
    },
    {
      "args": {
        "1": "en",
        "2": "plumb",
        "3": "line"
      },
      "expansion": "plumb + line",
      "name": "com"
    }
  ],
  "etymology_text": "From Middle English plumblyne, equivalent to plumb + line.",
  "forms": [
    {
      "form": "plumb lines",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "plumbline",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "plumb line (plural plumb lines)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "plumb"
    },
    {
      "word": "plummet"
    },
    {
      "word": "plumb bob"
    },
    {
      "tags": [
        "verb"
      ],
      "word": "plumb-line"
    }
  ],
  "senses": [
    {
      "glosses": [
        "A cord with a weight attached, used to produce a vertical line; a plummet."
      ],
      "links": [
        [
          "cord",
          "cord"
        ],
        [
          "weight",
          "weight"
        ],
        [
          "vertical",
          "vertical"
        ],
        [
          "plummet",
          "plummet"
        ]
      ]
    },
    {
      "glosses": [
        "Any vertical reference line."
      ],
      "links": [
        [
          "reference",
          "reference"
        ]
      ]
    }
  ],
  "word": "plumb line"
}