1.
Improper activities are illegal or dishonest. (FORMAL)
25 officers were investigated following allegations of ~ conduct during the murder inquiry...
ADJ
~ly
I acted neither fraudulently nor ~ly.
ADV: ADV with v
2.
Improper conditions or methods of treatment are not suitable or good enough for a particular purpose. (FORMAL)
The ~ use of medicine could lead to severe adverse reactions.
= inappropriate
ADJ: ADJ n
~ly
The study confirmed many reports that doctors were ~ly trained...
ADV: ADV with v
3.
If you describe someone’s behaviour as ~, you mean that it is rude or shocking. (OLD-FASHIONED)
He would never be ~, he is always the perfect gentleman.
= indecent
ADJ disapproval