Dictionary.com Unabridged

zipper

[zip-er]
noun
1.
Also called slide fastener. a device used for fastening clothing, valises, etc., consisting of two toothed tracks or spiral metal or plastic coils, each bordering one of two edges to be joined, and a piece that either interlocks or separates them when pulled.
2.
a person or thing that zips.
3.
a rubber and fabric boot or overshoe fastened up the leg by a zipper.
4.
a large illuminated display of news bulletins or advertisements that rapidly and continously flash by on an upper part of a building.
verb (used with object), verb (used without object)
5.
zip2.

Origin:
1920–25, Americanism; formerly a trademark; see zip1, -er1

zipperless, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
zipper (ˈzɪpə)
 
n
(US), (Canadian) Also called (in Britain and certain other countries): zip a fastening device operating by means of two parallel rows of metal or plastic teeth on either side of a closure that are interlocked by a sliding tab

zippered (ˈzɪpəd)
 
adj
provided or fastened with a zip

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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Etymonline
Word Origin & History

zipper
1925, probably from zip (1). The trademark taken out on the name that year applied to a boot with zippers, not to the "lightning fastener" itself, which was at first called a zip.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
He wore zippered cordovan boots, and they were highly polished.
Despite zippered top vents, the single walls sweated with condensation when the
  morning heated up in a hurry.
L-shaped zippered pockets on the outside allow easy access to your laptop and
  liquids baggie.
For exploring forests or ruins, pack mid-calf shorts, preferably with a
  removable zippered bottom half.
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