decorousˈdɛk ər əs
characterized by propriety and dignity and good taste in manners and conduct
"the tete-a-tete was decorous in the extreme"
becoming, comely, comme il faut, decent, decorous, seemly (adj)
according with custom or propriety
"her becoming modesty"; "comely behavior"; "it is not comme il faut for a gentleman to be constantly asking for money"; "a decent burial"; "seemly behavior"
Marked by proper behavior.