Definition of "autoloader"

(military) A mechanical device that loads ordnance into weapons such as tanks and artillery that would otherwise be loaded by a dedicated crew.

(computing) A mechanical device that automatically loads storage media (such as tapes or disks) into the device that can read them.  examples

(programming) A software mechanism that automatically locates and loads classes etc. as required at run time.  examples

(firearms) A semi-automatic firearm.  examples