decorum

Noun

1. Appropriate social behavior.
   • Everyone was assembled in the dining-room. Under the circumstances, we were naturally not a cheerful party. The reaction after a shock is always trying, and I think we were all suffering from it. Decorum and good...
   • It was sort of a finishing school. You know, to teach proper social decorum and so on and so forth. - 2010, Pseudonymous Bosch (pseudonym; Raphael Simon), This Isn't What It Looks Like, ch. 4

   Synonyms: decency courtesy propriety etiquette

2. A convention of social behavior.
   • In the architecture and embellishments of the chamber, the evident design was to dazzle and astound. Little attention had been paid to the decora of what is technically called “keeping,” or to the proprieties of...