characterized by propriety and dignity and good taste in manners and conduct
The tete-a-tete was decorous in the extreme.
source: WordNet 3.0
Suitable to a character, or to the time, place, and occasion; marked with decorum; becoming; proper; seemly; befitting; as, a decorous speech; decorous behavior; a decorous dress for a judge.
source: Webster 1913
adjective satellite
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.
