Top definition
A term used to describe any Windows PC program that doesn't require any kind of installation to be accessed, other than having to copy and paste the contents of the program's disc to your hard drive.
Because this game is a zero-install, I only have to transfer it to my hard drive and run the executable to play it.

This new program I bought functions as a zero-install, making it run on multiple systems at once.
by Diamondback26 February 13, 2010
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