verb (used with object) Computers.
to transfer (software, data, character sets, etc.) from a smaller to a larger computer.

up- + load

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
upload (ʌpˈləʊd) [Click for IPA pronunciation guide]
(tr) Compare to copy or transfer (data or a program) from one's own computer into the memory of another computer

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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American Heritage
Science Dictionary
upload   (ŭp'lōd')  Pronunciation Key 
To transfer data or programs from one's own computer or digital device to a server or host computer. Compare download.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Computing Dictionary

upload definition

/uhp'lohd/ To transfer programs or data over a digital communications link from a smaller or peripheral "client" system to a larger or central "host" one.
Opposite: download.
[Jargon File]

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
It takes five minutes to hook up the recorder to laptop and upload the file to
  one's website.
The form is separated into three easy steps and allows you to browse your
  computer for the specific image file you wish to upload.
Students suddenly became unable to upload the papers that they were expected to
  share with each other for the following day.
After activating the account and logging in, upload the map you wish to warp.
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