Definition: [noun] unacceptable or improper behaviour, especially by an employee or professional person.
Example: she was found guilty of professional misconduct by a disciplinary tribunal and dismissed
Definition: [noun] mismanagement, especially culpable neglect of duties.
Example: the general was pardoned for misconduct of the war
Definition: [verb] behave in an improper manner.
Example: the committee reprimanded two members who were found to have misconducted themselves
Definition: [verb] mismanage (an activity).
Example: there is no evidence that the premises were being misconducted