1. not proper; not strictly belonging, applicable, correct, etc.; erroneous: He drew improper conclusions from the scant evidence.
2. not in accordance with propriety of behavior, manners, etc.: improper conduct at a funeral.
3. unsuitable or inappropriate, as for the purpose or occasion: improper attire for a formal dance.
4. abnormal or irregular: improper functioning of the speech mechanism.
"conducts can be improper."
"uses can be improper."
"raisings can be improper."
"compensations can be improper."
"loans can be improper."
This list can help you learn new vocabulary more quickly and be able explore other words more easily.