Meaning of “dismiss” - Learner’s Dictionary

dismiss

verb [ T ] uk us /dɪˈsmɪs/
NOT CONSIDER

to refuse to consider an idea or opinion:

The committee dismissed the idea as rubbish.
MAKE LEAVE

to officially make someone leave their job:

[ often passive ] Anyone who breaks company rules will be dismissed.
ALLOW TO LEAVE

to give someone official permission to leave:

The bell rang and the teacher dismissed the class.

(Definition of “dismiss” from the Cambridge Learner’s Dictionary © Cambridge University Press)