dismiss someone
(from something ) (for something) to discharge someone from employment for some reason; to fire someone from a job for some cause. We will have to dismiss him from employment for absenteeism. She was dismissed from the bank for making many errors in one month.
dismiss something as something
to put something out of one's mind or ignore something as something. (The second something can be a noun or an adjective.) I dismissed the whole idea as foolishness. It was not possible to dismiss the whole matter as a one-time happening. Molly dismissed the whole event as accidental.