1. the quality or state of being improper, inappropriate, or unsuitable

Examples

• The teacher pointed out the improperness of using slang in formal essays.
• He was embarrassed by the improperness of his casual attire at the formal dinner.
• The committee discussed the improperness of the proposed budget allocation.
• She questioned the improperness of sharing confidential information.
• The improperness of his behavior at the meeting was widely criticized.
• The judge ruled on the improperness of the evidence presented.