Decorum vs. Propriety — What's the Difference?

Decorum (from the Latin: "right, proper") was a principle of classical rhetoric, poetry and theatrical theory concerning the fitness or otherwise of a style to a theatrical subject. The concept of decorum is also applied to prescribed limits of appropriate social behavior within set situations.

Conformity to conventional standards of behavior or morality.

Appropriateness of behavior or conduct; propriety

Proprieties Socially correct usages or behaviors.

Decorums The conventions or requirements of polite behavior

The quality of being proper; appropriateness.

The appropriateness of an element of an artistic or literary work, such as style or tone, to its particular circumstance or to the composition as a whole.

(obsolete) The particular character or essence of someone or something; individuality.

(uncountable) Appropriate social behavior.

(obsolete) A characteristic; an attribute.

(countable) A convention of social behavior.

A piece of land owned by someone; someone's property.

Propriety of manner or conduct; grace arising from suitableness of speech and behavior to one's own character, or to the place and occasion; decency of conduct; seemliness; that which is seemly or suitable.

(obsolete) More generally, something owned by someone; a possession.

Propriety in manners and conduct

The fact of possessing something; ownership.

Correct language or pronunciation.

Suitability, fitness; the quality of being appropriate.

Correctness in behaviour and morals; good manners, seemliness.

Individual right to hold property; ownership by personal title; property.

That which is proper or peculiar; an inherent property or quality; peculiarity.

The quality or state of being proper; suitableness to an acknowledged or correct standard or rule; consonance with established principles, rules, or customs; fitness; appropriateness; as, propriety of behavior, language, manners, etc.

Correct or appropriate behavior