

Semi-automatic is a specific type of action where after firing, the bolt removes the spent case and chambers the next round without further manual input from the operator as would be required in lever actions, bolt actions, etc.
Well, semi-automatic also interrupts the action so it only gives one shot per trigger pull, versus burst mechanisms or fully automatic.
So as for what is not a semi-automatic? Any gun requiring manual operation to clear the spent case and chamber a new round or can fire more than one round per trigger pull.
As opposed to the secret stroke beam that gets you a meeting with HR.