"index's" meaning in English

{
  "forms": [
    {
      "form": "index’s",
      "tags": [
        "canonical",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "noun form",
        "g": "p",
        "head": "index’s"
      },
      "expansion": "index’s pl",
      "name": "head"
    }
  ],
  "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": "English plurals in -'s",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1699, Richard Bentley, “The Preface”, in A Dissertation upon the Epistles of Phalaris. With an Answer to the Objections of the Honourable Charles Boyle, Esquire, London: […] J[ohn] H[umphreys] for Henry Mortlock […], and John Hartley […], →OCLC, page lxxix:",
          "text": "As for the General Character, that Mr. B. endeavours to fix upon me, That I have no Learning, no Judgment, no Reaſoning, no Knowledge in Books, except Index’s and Vocabularies, with many other Expreſſions of the utmoſt Contempt, that make up the greateſt part of his Book, I do not think my ſelf concern’d to anſwer them.",
          "type": "quote"
        },
        {
          "ref": "1699, Richard Bentley, “A Dissertation upon the Epistles of Phalaris”, in A Dissertation upon the Epistles of Phalaris. With an Answer to the Objections of the Honourable Charles Boyle, Esquire, London: […] J[ohn] H[umphreys] for Henry Mortlock […], and John Hartley […], →OCLC, section XIII, page 421:",
          "text": "For Quintilian does not ſpeak of ſuch Index'''’s as Books have now-a-days: but after he had nam’d ſeveral of the Greek Poets, Homer, Antimachus, Euphorion, &c. […]",
          "type": "quote"
        }
      ],
      "form_of": [
        {
          "word": "index"
        }
      ],
      "glosses": [
        "plural of index"
      ],
      "id": "en-index's-en-noun-LMzS8OWu",
      "links": [
        [
          "John A. Simpson",
          "w:John Simpson (lexicographer)"
        ],
        [
          "Edmund S. C. Weiner",
          "w:Edmund Weiner"
        ],
        [
          "The Oxford English Dictionary",
          "w:Oxford English Dictionary"
        ],
        [
          "Clarendon Press",
          "w:Oxford University Press"
        ],
        [
          "index",
          "index#English"
        ]
      ],
      "raw_glosses": [
        "(obsolete, in use in the 17th century) plural of index"
      ],
      "raw_tags": [
        "in use in the 17th century"
      ],
      "tags": [
        "form-of",
        "obsolete",
        "plural"
      ]
    }
  ],
  "word": "index's"
}

{
  "forms": [
    {
      "form": "index’s",
      "tags": [
        "canonical",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "noun form",
        "g": "p",
        "head": "index’s"
      },
      "expansion": "index’s pl",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English non-lemma forms",
        "English noun forms",
        "English plurals in -'s",
        "English terms with obsolete senses",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1699, Richard Bentley, “The Preface”, in A Dissertation upon the Epistles of Phalaris. With an Answer to the Objections of the Honourable Charles Boyle, Esquire, London: […] J[ohn] H[umphreys] for Henry Mortlock […], and John Hartley […], →OCLC, page lxxix:",
          "text": "As for the General Character, that Mr. B. endeavours to fix upon me, That I have no Learning, no Judgment, no Reaſoning, no Knowledge in Books, except Index’s and Vocabularies, with many other Expreſſions of the utmoſt Contempt, that make up the greateſt part of his Book, I do not think my ſelf concern’d to anſwer them.",
          "type": "quote"
        },
        {
          "ref": "1699, Richard Bentley, “A Dissertation upon the Epistles of Phalaris”, in A Dissertation upon the Epistles of Phalaris. With an Answer to the Objections of the Honourable Charles Boyle, Esquire, London: […] J[ohn] H[umphreys] for Henry Mortlock […], and John Hartley […], →OCLC, section XIII, page 421:",
          "text": "For Quintilian does not ſpeak of ſuch Index'''’s as Books have now-a-days: but after he had nam’d ſeveral of the Greek Poets, Homer, Antimachus, Euphorion, &c. […]",
          "type": "quote"
        }
      ],
      "form_of": [
        {
          "word": "index"
        }
      ],
      "glosses": [
        "plural of index"
      ],
      "links": [
        [
          "John A. Simpson",
          "w:John Simpson (lexicographer)"
        ],
        [
          "Edmund S. C. Weiner",
          "w:Edmund Weiner"
        ],
        [
          "The Oxford English Dictionary",
          "w:Oxford English Dictionary"
        ],
        [
          "Clarendon Press",
          "w:Oxford University Press"
        ],
        [
          "index",
          "index#English"
        ]
      ],
      "raw_glosses": [
        "(obsolete, in use in the 17th century) plural of index"
      ],
      "raw_tags": [
        "in use in the 17th century"
      ],
      "tags": [
        "form-of",
        "obsolete",
        "plural"
      ]
    }
  ],
  "word": "index's"
}