im ‧ prop ‧ er /ɪmˈprɒpə $ -ˈprɑːpər/ BrE AmE adjective
1 . dishonest, illegal, or morally wrong
it is improper (for somebody) to do something
He realised that it was improper for a police officer to accept gifts.
improper behaviour/conduct/dealings etc
allegations of improper banking practices
improper sexual conduct
2 . not sensible, right, or fair in a particular situation SYN inappropriate
it is improper to do something
It would be improper of me to comment before the election outcome is known.
3 . wrong or not correct
—improperly adverb :
If you are improperly dressed, you will not be admitted.