Important context autotldr missed:
The incident happened when the engineer was programming the software that controls the robots, which cut car parts from aluminium, The Information reported.
Two of the robots were disabled, but a third was inadvertently left on. As it went through its normal motions, it caught the worker in its claws.
Yikes, that should be checked multiple times before someone gets close to the clawed aluminum cutting robot. Failure of process, I suspect.
So this is actually an interesting term. Looking it up from Wikipedia…
So as applied to phones it originally meant a particular type of download and install - rather than installing directly to your phone from an app store, you have somehow obtained the file on your PC, transferred the file to your phone, and then installed it. In that context, downloading an APK directly to your phone and installing it would not be sideloading.
However, semantics have shifted somewhat and now it’s used generally to refer to any install that isn’t directly from an app store of some kind, and requires downloading an actual package file and then installing it.