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[uhn-zip] /ʌnˈzɪp/
verb (used with object), unzipped, unzipping.
to open the zipper of.
verb (used without object), unzipped, unzipping.
to become unzipped.
Origin of unzip
1935-40; un-2 + zip2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for unzip


verb -zips, -zipping, -zipped
to unfasten the zip of (a garment) or (of a zip or garment with a zip) to become unfastened: her skirt unzipped as she sat down
(transitive) (computing) to decompress (a file) that had previously been zipped
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for unzip

1939, from un- (2) + zip (v.). Related: Unzipped; unzipping.

Online Etymology Dictionary, © 2010 Douglas Harper
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unzip in Technology

1. To extract files from an archive created with PKWare's PKZIP archiver.
2. A program to list, test, or extract files from a ZIP archive, commonly found on MS-DOS systems. zip, creates ZIP archives; both programs are compatible with archives created by PKWARE's PKZIP and PKUNZIP for MS-DOS.
The Free On-line Dictionary of Computing, © Denis Howe 2010
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