RhymeZone: semi-automatic definitions

Definitions of semi-automatic:

adjective: Partially automatic.
adjective: Of a firearm that automatically ejects a shell and loads the next one, but requires the trigger to be squeezed for each shot; autoloading.
noun: (weaponry) A semi-automatic firearm, especially such a pistol.
noun: (automotive) A semi-automatic transmission.

(Definitions from Wiktionary)