"slip case" meaning in English

{
  "forms": [
    {
      "form": "slip cases",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "slip case (plural slip cases)",
      "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"
        }
      ],
      "examples": [
        {
          "ref": "1835, Maria Edgeworth, Richard Lovell Edgeworth, Practical Education",
          "text": "for, if there should appear a pocket-book, which may be drawn up by a riband from its slip case . . . the child would seize upon these with delight.",
          "type": "quotation"
        },
        {
          "text": "2003 Miriam A. Drake - Encyclopedia of Library and Information Science\nIf a noble book suggests the need of a noble binding, consider a chemise inserted into a tastefully decorated slip case, leaving the book in its original state."
        }
      ],
      "glosses": [
        "A removable protective covering for a book etc"
      ],
      "id": "en-slip_case-en-noun-a~1rbKFI",
      "links": [
        [
          "removable",
          "removable"
        ],
        [
          "protective",
          "protective"
        ],
        [
          "covering",
          "covering"
        ],
        [
          "book",
          "book"
        ]
      ],
      "synonyms": [
        {
          "word": "slip-case"
        }
      ]
    }
  ],
  "word": "slip case"
}

{
  "forms": [
    {
      "form": "slip cases",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "slip case (plural slip cases)",
      "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",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1835, Maria Edgeworth, Richard Lovell Edgeworth, Practical Education",
          "text": "for, if there should appear a pocket-book, which may be drawn up by a riband from its slip case . . . the child would seize upon these with delight.",
          "type": "quotation"
        },
        {
          "text": "2003 Miriam A. Drake - Encyclopedia of Library and Information Science\nIf a noble book suggests the need of a noble binding, consider a chemise inserted into a tastefully decorated slip case, leaving the book in its original state."
        }
      ],
      "glosses": [
        "A removable protective covering for a book etc"
      ],
      "links": [
        [
          "removable",
          "removable"
        ],
        [
          "protective",
          "protective"
        ],
        [
          "covering",
          "covering"
        ],
        [
          "book",
          "book"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "slip-case"
    }
  ],
  "word": "slip case"
}