noun:a reason or explanation given to justify a fault or offense
His excuse for being late was that his car wouldn't start.
verb:to attempt to lessen the blame for a fault or offense; to justify
Please don't try to excuse your rude behavior.
verb:to release someone from a duty or requirement
She was excused from the final exam because of her perfect attendance.
verb:to forgive or pardon someone for an error or wrongdoing
The manager excused the employee's mistake after hearing the circumstances.
interjection:a polite expression used to get someone's attention or to apologize for a minor inconvenience
Excuse me, could you tell me where the nearest subway station is?