dismissal
US /dɪˈsmɪs.əl/
UK /dɪˈsmɪs.əl/

1.
the act of ordering or allowing someone to leave
:
•
The teacher's dismissal of the class was met with cheers.
•
He requested dismissal from the meeting early.
2.
the act of ending someone's employment
:
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His dismissal from the company was unexpected.
•
The union protested the unfair dismissal of the workers.
3.
the act of treating something as unworthy of consideration; disregard
:
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His casual dismissal of her concerns was hurtful.
•
The committee's dismissal of the proposal caused much debate.
4.
(in sport) an act of sending a player off the field
:
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The referee's dismissal of the player changed the game.
•
He received a red card and faced immediate dismissal.