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[uhp-lohd] /ˈʌpˌloʊd/
verb (used with object), Computers.
to transfer (software, data, character sets, etc.) from a smaller to a larger computer.
Origin of upload
up- + load Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for upload


(transitive) to copy or transfer (data or a program) from one's own computer into the memory of another computer Compare download (sense 1)
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 upload

by 1980, from up + load (v.). Related: Uploaded; uploading.

Online Etymology Dictionary, © 2010 Douglas Harper
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upload in Science
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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upload in Technology

/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
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