1. behavior that is proper, dignified, and in good taste; appropriate conduct according to social conventions

Examples

• The students maintained proper decorum during the graduation ceremony.
• His lack of decorum at the formal dinner embarrassed his family.
• The judge demanded decorum in the courtroom at all times.
• She always conducted herself with decorum in professional settings.
• The wedding guests were expected to observe decorum throughout the service.
• Breaking decorum by shouting during the speech was highly inappropriate.