unacceptable or improper behaviour, especially by an employee or professional person

she was found guilty of professional misconduct by a disciplinary tribunal and dismissed

mismanagement, especially culpable neglect of duties

the general was pardoned for misconduct of the war

behave in an improper manner

the committee reprimanded two members who were found to have misconducted themselves

mismanage (an activity)

there is no evidence that the premises were being misconducted