The state or quality of conforming to conventionally accepted standards of behavior or morals. She was careful to maintain a sense of propriety during the formal dinner.
The details or rules of behavior conventionally considered to be correct. He was unsure about the proprieties of addressing a member of the royal family.
The appropriateness or suitability of an action, idea, or decision; correctness. Several shareholders doubted the propriety of the CEO's expense claims.