0 in a way that is dishonest or against a law or a rule:
Authorities say the two men had improperly obtained driving licences.
According to the prosecutor, he had improperly shared classified information.
1 in a way that is unsuitable or not correct for a particular use or occasion:
The legislators had acted improperly by making the law retroactive.
He said that he has never acted improperly during committee meetings.
There are two to four complaints a year about instructors behaving improperly and getting too close to students.
Content for the newsletter frequently comes through improperly formatted.
We didn’t realize until we arrived that it was a formal event and we were improperly dressed.
