Not maimed, it's any kind of injury (at least according to Amazon). They claim their number are so high because the fastidiously report any injury.
If there is such a thing where is the line. I'd draw the line at anything that requires more care than can be provided on-site, IE you had to go to the clinic/hospital due to the injury.
https://theintercept.com/2019/12/02/amazon-warehouse-workers...