Short for "semi-automatic."
1. (adj.) The characteristic, of a firearm
, of being able to fire a single round for each pull of the trigger.
2. (n.) A firearm with
Commonly mistaken to mean fully automatic
, which indicates a firearm most people would
call a "machine gun," with which the user pulls the trigger
a single time and holds it and the entire magazine is fired in succession, usually within a few seconds.