Noun

(uncountable) Appropriate social behavior; propriety

* 2010 — , This Isn't What It Looks Like , ch. 4

It was sort of a finishing school. You know, to teach proper social decorum and so on and so forth.

(countable) A convention of social behavior

Noun

Clarity, lucidity, especially in expression; the state or characteristic of being perspicuous.

* 1905 , (George Bernard Shaw), The Irrational Knot , ch. 18,

Whether through the first officer's want of perspicuity or my own stupidity, I was not a bit the wiser for the explanation.

Perspicacity; insight.

*

, title=(The Celebrity), chapter=4 , passage=“Well,” I answered, at first with uncertainty, then with inspiration, “he would do splendidly to lead your cotillon, if you think of having one.” ¶ “So you do not dance, Mr. Crocker?” ¶ I was somewhat set back by her perspicuity .}}

* 1965 , " The Stupid Spy," Time , 19 Mar,

Thompson, a high school dropout, said with rare perspicuity that he doubted the FBI would hire him.

(rare) Transparency; translucence.

* 1900 , (w), The Touchstone , ch. 11,

It must have been on some such day of harsh sunlight, the incisive February brightness that gives perspicuity without warmth.