"guard book" meaning in English

{
  "forms": [
    {
      "form": "guard books",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "guard book (plural guard books)",
      "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"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Advertising",
          "orig": "en:Advertising",
          "parents": [
            "Business",
            "Marketing",
            "Economics",
            "Society",
            "Social sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1997, Judith Burg, A Guide to the Rowntree and Mackintosh Company Archives:",
          "text": "Most of the advertising material surviving from Rowntree & Co. is in the form of guard books of cuttings and proofs of press and magazine advertising, and therefore most of the material pre c. 1950 is in black and white.",
          "type": "quote"
        }
      ],
      "glosses": [
        "An advertising agency's internal archive of work done for a particular client."
      ],
      "id": "en-guard_book-en-noun-81~b8ZZl",
      "links": [
        [
          "advertising",
          "advertising#Noun"
        ],
        [
          "advertising agency",
          "advertising agency"
        ],
        [
          "internal",
          "internal"
        ],
        [
          "archive",
          "archive"
        ],
        [
          "work",
          "work"
        ],
        [
          "client",
          "client"
        ]
      ],
      "raw_glosses": [
        "(advertising) An advertising agency's internal archive of work done for a particular client."
      ],
      "topics": [
        "advertising",
        "business",
        "marketing"
      ]
    }
  ],
  "word": "guard book"
}

{
  "forms": [
    {
      "form": "guard books",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "guard book (plural guard books)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "Quotation templates to be cleaned",
        "en:Advertising"
      ],
      "examples": [
        {
          "ref": "1997, Judith Burg, A Guide to the Rowntree and Mackintosh Company Archives:",
          "text": "Most of the advertising material surviving from Rowntree & Co. is in the form of guard books of cuttings and proofs of press and magazine advertising, and therefore most of the material pre c. 1950 is in black and white.",
          "type": "quote"
        }
      ],
      "glosses": [
        "An advertising agency's internal archive of work done for a particular client."
      ],
      "links": [
        [
          "advertising",
          "advertising#Noun"
        ],
        [
          "advertising agency",
          "advertising agency"
        ],
        [
          "internal",
          "internal"
        ],
        [
          "archive",
          "archive"
        ],
        [
          "work",
          "work"
        ],
        [
          "client",
          "client"
        ]
      ],
      "raw_glosses": [
        "(advertising) An advertising agency's internal archive of work done for a particular client."
      ],
      "topics": [
        "advertising",
        "business",
        "marketing"
      ]
    }
  ],
  "word": "guard book"
}