To download a file, esp. an application, to a smartphone or other electronic device outside of the accepted or usual channels.
The app center says the eBay app isn't available yet for the new OS on my phone, so I had to sideload an earlier version from a Dropbox link I found.
door Eduardo Suave 6 september 2011
2 more definitions
To upload or download information from the side of a PC, usually through a USB port.
I'm sideloading the music to my Zune
door Jerse47 1 maart 2009
To transfer content from one device to another, within a range of permitted devices. Often you need to do this within a certain time frame
If you haven't got time to watch that movie on your PS3 then just sideload it to your PSP and watch it on the train
door DJDK 1 augustus 2011