"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": [
    {
      "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": [
        {
          "text": "1928: Men who can read blue prints are at a premium everywhere in this six billion dollar field. (Ad in Popular Science, March 1928)"
        },
        {
          "ref": "1960, P[elham] G[renville] Wodehouse, chapter XV, in Jeeves in the Offing, London: Herbert Jenkins, →OCLC:",
          "text": "[Jeeves] was miffed because he wasn't the brains behind this binge, the blue prints for it having been laid down by a rival. Even great men have their weaknesses.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Dated spelling of blueprint."
      ],
      "id": "en-blue_print-en-noun-cIdEV0BW",
      "links": [
        [
          "blueprint",
          "blueprint#English"
        ]
      ]
    }
  ],
  "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": [
    {
      "categories": [
        "English countable nouns",
        "English dated forms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "1928: Men who can read blue prints are at a premium everywhere in this six billion dollar field. (Ad in Popular Science, March 1928)"
        },
        {
          "ref": "1960, P[elham] G[renville] Wodehouse, chapter XV, in Jeeves in the Offing, London: Herbert Jenkins, →OCLC:",
          "text": "[Jeeves] was miffed because he wasn't the brains behind this binge, the blue prints for it having been laid down by a rival. Even great men have their weaknesses.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Dated spelling of blueprint."
      ],
      "links": [
        [
          "blueprint",
          "blueprint#English"
        ]
      ]
    }
  ],
  "word": "blue print"
}