"blue-print" meaning in English

{
  "forms": [
    {
      "form": "blue-prints",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "blue-print (plural blue-prints)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "blueprint"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1915, Richard Harding Davis, Somewhere in France, p. 4",
          "text": "One day he brought from the barracks a roll of blue-prints, and as he was locking them in a drawer, said: “The Germans would pay through the nose for those!”"
        }
      ],
      "glosses": [
        "Alternative spelling of blueprint"
      ],
      "id": "en-blue-print-en-noun-S1kkw2D0",
      "links": [
        [
          "blueprint",
          "blueprint#English"
        ]
      ],
      "raw_glosses": [
        "(dated) Alternative spelling of blueprint"
      ],
      "tags": [
        "alt-of",
        "alternative",
        "dated"
      ]
    }
  ],
  "word": "blue-print"
}

{
  "forms": [
    {
      "form": "blue-prints",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "blue-print (plural blue-prints)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "blueprint"
        }
      ],
      "categories": [
        "English countable nouns",
        "English dated terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1915, Richard Harding Davis, Somewhere in France, p. 4",
          "text": "One day he brought from the barracks a roll of blue-prints, and as he was locking them in a drawer, said: “The Germans would pay through the nose for those!”"
        }
      ],
      "glosses": [
        "Alternative spelling of blueprint"
      ],
      "links": [
        [
          "blueprint",
          "blueprint#English"
        ]
      ],
      "raw_glosses": [
        "(dated) Alternative spelling of blueprint"
      ],
      "tags": [
        "alt-of",
        "alternative",
        "dated"
      ]
    }
  ],
  "word": "blue-print"
}