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decorum

American  
[dih-kawr-uhm, -kohr-] / dɪˈkɔr əm, -ˈkoʊr- /

noun

  1. dignified propriety of behavior, speech, dress, etc.

    Synonyms:
    dignity, politeness
  2. the quality or state of being decorous, or exhibiting such dignified propriety; orderliness; regularity.

  3. Usually decorums an observance or requirement of polite society.


decorum British  
/ dɪˈkɔːrəm /

noun

  1. propriety, esp in behaviour or conduct

  2. a requirement of correct behaviour in polite society

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Related Words

See etiquette.

Etymology

Origin of decorum

First recorded in 1560–70; from Latin decōrum, noun use of neuter of decōrus decorous

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Live tennis and live golf offer details that can’t be captured on television, but there are rules of decorum and big potential for monotony.

From Los Angeles Times • Jan. 22, 2026

Back then, he knew he had to eke out a mealy-mouthed apology for the sake of decorum.

From Slate • Jan. 13, 2026

Even if tiny mics are a trend that’s crossed over from influencer culture, they’ve become yet another obnoxious staple of the film industry that favors a viewer’s pleasure over decorum.

From Salon • Jan. 11, 2026

Japan's emperor is generally treated with hushed reverence, but one man stripped away all decorum -- quite literally -- during a New Year's event on Friday, local media reported.

From Barron's • Jan. 2, 2026

“If ever I hear again of any lapse from a proper standard of infantile decorum, I shall ask for your transference to a Sub-Centre— preferably to Iceland. Good morning.”

From "Brave New World" by Aldous Huxley