|Origin:||dimissus, past participle of dimittere 'to send away'|
to refuse to consider someone's idea, opinion etc, because you think it is not serious, true, or important:
The government has dismissed criticisms that the country's health policy is a mess.
dismiss something as something
He just laughed and dismissed my proposal as unrealistic.
It's an idea that shouldn't be dismissed out of hand (=dismissed immediately and completely).
to remove someone from their job [= fire, sack]
dismiss somebody for something
Employees can be dismissed for sending obscene emails.
to tell someone that they are allowed to go, or are no longer needed:
The class was dismissed early today.
if a judge dismisses a court case, he or she stops it from continuing:
The case was dismissed owing to lack of evidence.
to end the innings of a player or team in the game of cricket