Semi-automatic

Alternative forms

• semiautomatic
• semi-auto

Full definition of semi-automatic

Adjective

1. Partially automatic.
2. 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

1. (weapons) A semi-automatic firearm, especially such a pistol.
2. (automotive) A semi-automatic transmission