"book-length" meaning in English

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      "expansion": "book-length",
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
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          "name": "English entries with incorrect language header",
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          "ref": "1956, University of Tennessee Studies in the Humanities, volumes 1-6, page 75:",
          "text": "When he dedicated his book-length poem Hesperia to a patronymically disguised but not entirely fictional lady, Richard Henry Wilde wrote that she had \"advised me to attempt a poem of some length, in hopes that an occupation ...",
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          "ref": "2006, James T. Costa, The Other Insect Societies, page 667:",
          "text": "While I feel badly perhaps contributing to the underappreciation of these arthropods, particularly in the realm of sociality, I take some comfort in the knowledge that book-length treatments of some of these groups are under way.",
          "type": "quote"
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          "ref": "2007, Jennifer McClinton-Temple, Alan Velie (editors), Encyclopedia of American Indian Literature:",
          "text": "In from Sand Creek, a book-length sequence of untitled short poems accompanied by prose fragments, Simon Ortiz attempts to document a massacre of Southern Cheyenne and Arapaho by the U.S. cavalry in 1864 and the effects of this historical event on Native people in the author's time.",
          "type": "quote"
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      ],
      "glosses": [
        "Of a document, composition, or other entity: as long as a book; i.e. very long or extensive."
      ],
      "id": "en-book-length-en-adj-wQ7kyT~B",
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      "raw_glosses": [
        "(idiomatic) Of a document, composition, or other entity: as long as a book; i.e. very long or extensive."
      ],
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          "word": "book length"
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  "word": "book-length"
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  "pos": "adj",
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      "word": "book length"
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          "ref": "1956, University of Tennessee Studies in the Humanities, volumes 1-6, page 75:",
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        },
        {
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          "ref": "2006, James T. Costa, The Other Insect Societies, page 667:",
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          "type": "quote"
        },
        {
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              22,
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          "ref": "2007, Jennifer McClinton-Temple, Alan Velie (editors), Encyclopedia of American Indian Literature:",
          "text": "In from Sand Creek, a book-length sequence of untitled short poems accompanied by prose fragments, Simon Ortiz attempts to document a massacre of Southern Cheyenne and Arapaho by the U.S. cavalry in 1864 and the effects of this historical event on Native people in the author's time.",
          "type": "quote"
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      ],
      "glosses": [
        "Of a document, composition, or other entity: as long as a book; i.e. very long or extensive."
      ],
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        "(idiomatic) Of a document, composition, or other entity: as long as a book; i.e. very long or extensive."
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  "word": "book-length"
}