1. not in keeping with good taste and propriety; improper or unseemly
Usage: formal

Examples

• His loud laughter during the funeral service was considered indecorous.
• The senator’s indecorous behavior at the formal dinner embarrassed his colleagues.
• It would be indecorous to wear casual clothes to such a prestigious event.
• The teacher found the student’s indecorous comments disruptive to the class.
• Her indecorous conduct at the wedding reception shocked the other guests.
• The journalist’s indecorous questions made the interview uncomfortable.