"unback" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "un",
        "3": "back"
      },
      "expansion": "un- + back",
      "name": "prefix"
    }
  ],
  "etymology_text": "un- + back",
  "forms": [
    {
      "form": "unbacks",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "unbacking",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "unbacked",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "unbacked",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "unback (third-person singular simple present unbacks, present participle unbacking, simple past and past participle unbacked)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "_dis": "58 42",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "49 51",
          "kind": "other",
          "name": "English terms prefixed with un-",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "1896, Ida Worden Wheeler, chapter 10, in Siegfried the Mystic, Boston: Arena Publishing Company, page 109",
          "text": "“When you go home,” resumed Josephine, “unback the miniature case and upon the surface opposite the painting you will find these words […]”",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To remove the back or backing from (something)."
      ],
      "id": "en-unback-en-verb-btNOkE4s",
      "links": [
        [
          "remove",
          "remove"
        ],
        [
          "back",
          "back"
        ],
        [
          "backing",
          "backing"
        ]
      ],
      "raw_glosses": [
        "(transitive, rare) To remove the back or backing from (something)."
      ],
      "tags": [
        "rare",
        "transitive"
      ]
    },
    {
      "categories": [
        {
          "_dis": "49 51",
          "kind": "other",
          "name": "English terms prefixed with un-",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "1599, Henry Petowe, Philochasander and Elanira, London: Thomas Purfoot",
          "text": "Her horse againe this Princesse must vnbacke,",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To deprive (a horse) of its rider."
      ],
      "id": "en-unback-en-verb-WeqPdpS3",
      "links": [
        [
          "deprive",
          "deprive"
        ],
        [
          "rider",
          "rider"
        ]
      ],
      "raw_glosses": [
        "(transitive, obsolete) To deprive (a horse) of its rider."
      ],
      "tags": [
        "obsolete",
        "transitive"
      ]
    }
  ],
  "word": "unback"
}

{
  "categories": [
    "English entries with incorrect language header",
    "English lemmas",
    "English terms prefixed with un-",
    "English verbs"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "un",
        "3": "back"
      },
      "expansion": "un- + back",
      "name": "prefix"
    }
  ],
  "etymology_text": "un- + back",
  "forms": [
    {
      "form": "unbacks",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "unbacking",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "unbacked",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "unbacked",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "unback (third-person singular simple present unbacks, present participle unbacking, simple past and past participle unbacked)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English terms with quotations",
        "English terms with rare senses",
        "English transitive verbs"
      ],
      "examples": [
        {
          "ref": "1896, Ida Worden Wheeler, chapter 10, in Siegfried the Mystic, Boston: Arena Publishing Company, page 109",
          "text": "“When you go home,” resumed Josephine, “unback the miniature case and upon the surface opposite the painting you will find these words […]”",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To remove the back or backing from (something)."
      ],
      "links": [
        [
          "remove",
          "remove"
        ],
        [
          "back",
          "back"
        ],
        [
          "backing",
          "backing"
        ]
      ],
      "raw_glosses": [
        "(transitive, rare) To remove the back or backing from (something)."
      ],
      "tags": [
        "rare",
        "transitive"
      ]
    },
    {
      "categories": [
        "English terms with obsolete senses",
        "English terms with quotations",
        "English transitive verbs",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1599, Henry Petowe, Philochasander and Elanira, London: Thomas Purfoot",
          "text": "Her horse againe this Princesse must vnbacke,",
          "type": "quotation"
        }
      ],
      "glosses": [
        "To deprive (a horse) of its rider."
      ],
      "links": [
        [
          "deprive",
          "deprive"
        ],
        [
          "rider",
          "rider"
        ]
      ],
      "raw_glosses": [
        "(transitive, obsolete) To deprive (a horse) of its rider."
      ],
      "tags": [
        "obsolete",
        "transitive"
      ]
    }
  ],
  "word": "unback"
}