pro·pri·e·ty /prəˈpraɪəti/
  禮貌,規矩,適當
  Pro·pri·e·ty n.; pl. Proprieties
  1. Individual right to hold property; ownership by personal title; property. [Obs.] “Onles this propriety be exiled.”
     So are the proprieties of a wife to be disposed of by her lord, and yet all are for her provisions, it being a part of his need to refresh and supply hers.   --Jer. Taylor.
  2. That which is proper or peculiar; an inherent property or quality; peculiarity. [Obs.]
     We find no mention hereof in ancient zoographers, . . . who seldom forget proprieties of such a nature.   --Sir T. Browne.
  3. 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. “The rule of propriety,”
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  propriety
       n : correct or appropriate behavior [syn: properness, correctitude]
           [ant: impropriety, impropriety]