1. [ adjective ] not in keeping with accepted standards of what is right or proper in polite society
Synonyms: indecent untoward unseemly uncomely unbecoming

"was buried with indecent haste" "indecorous behavior" "language unbecoming to a lady" "unseemly to use profanity" "moved to curb their untoward ribaldry"

Related terms: improper
2. [ adjective ] lacking propriety and good taste in manners and conduct
Synonyms: indelicate

"indecorous behavior"

Related terms: decorous indecent improper
Similar spelling:   indecorously