1. to send someone away or tell them to leave
2. to remove someone from a job or position
3. to refuse to consider or accept something as unimportant or wrong

Examples

• The teacher dismisses the class at 3:00 PM every day.
• The company dismisses employees who violate safety rules.
• She dismisses his concerns as unnecessary worry.
• The judge dismisses the case due to lack of evidence.
• The principal dismisses students early before the holiday.
• He dismisses criticism without listening to it.
• The court dismisses the lawsuit against the defendant.