noun.
Appropriateness of behavior or conduct; propriety.
noun.
The conventions or requirements of polite behavior.
noun.
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.
The Century Dictionary and Cyclopedia
noun.
Propriety of speech, behavior, or dress; formal politeness; orderliness; seemliness; decency.
noun.
In general, fitness, suitableness, or propriety of anything, with respect to occasion, purpose, or use.
the GNU version of the Collaborative International Dictionary of English
noun.
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.