not abridged or shortened, as a book.
a dictionary that has not been reduced in size by omission of terms or definitions; the most comprehensive edition of a given dictionary.

1590–1600; un-1 + abridged

1. entire, complete, uncut, uncondensed.
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World English Dictionary
unabridged (ˌʌnəˈbrɪdʒd)
(of a book, speech, etc) not reduced in length by condensing

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

1599, from un- (1) "not" + pp. of abridge. Since 19c. chiefly in ref. to literary works.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Below is a listing of the shortened terms used in the table and their full,
  unabridged equivalents used in the report.
See the next page for a listing of the shortened terms in the table and their
  full unabridged equivalents used in the report.
They symbolize much that has been lost to progress wide-open spaces,
  self-sufficiency and a sense of unabridged freedom.
The files holding the data are as thick as unabridged dictionaries.
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