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Wordabulary

decorous

UK /ˈdekərəs/ US /ˈdekərəs/ Syllables: dec-or-ous

Pronunciation
Adjective C1 Advanced Formal

Quick answer

Showing behavior that is polite and appropriate for the occasion.

Decorous describes behavior, manners or appearance that is polite, proper and fitting for the occasion. A decorous guest speaks quietly, dresses suitably and does not cause a scene. The word often has a slightly old-fashioned feeling, as in a decorous silence or a decorous bow. Close words are proper, seemly, polite, dignified, well-mannered and becoming. The opposite is improper, unseemly or undignified. Decorous is a formal word, often used for conduct at ceremonies, dinners and meetings. It can sound mildly humorous when used for something that is trying very hard to be proper. The adverb is decorously and the noun is decorousness. A related word is decorum, which means proper behavior.

"She gave a decorous nod to the visiting dignitaries."

Example sentences

  • "The guests kept a decorous silence during the speech."

    Level C1

  • "She gave a decorous nod and sat down."

    Level C1

  • "His manner at the dinner was perfectly decorous."

    Level C1

  • "The children were decorous for ten minutes before the noise began."

    Level C2

Synonyms and antonyms

Synonyms

Antonyms

improper unseemly

Look-alikes and common mistakes

  • decorative : Decorative means meant to make something look nice. Decorous is about proper behavior.
  • decorum : Decorum is the noun for proper behavior. Decorous is the adjective.
  • decrepit : Decrepit means old and in poor condition. It looks a little like decorous but is unrelated in meaning.
  • prudish : Prudish means too easily shocked. Decorous is simply proper, not extreme.

Word family and forms

Forms: more decorous, most decorous

decorously decorousness undecorous decorum

Word partners

Words and phrases that often go with "decorous".

  • decorous behavior
  • a decorous silence
  • a decorous manner
  • decorous dress
  • decorously quiet
  • decorous conduct

Origin

Decorous was first recorded in English in the mid 1600s. It comes from the Latin word decorus, meaning seemly or fitting, plus the English ending ous. The Latin word is related to decor, meaning ornament or grace, and to the verb decere, meaning to be fitting.

Checked against: Wiktionary, the free dictionary, Dictionary.com.

How to remember it

Decorous looks like decor and decorum. Decor makes a room look right, and decorous behavior makes a person look right for the occasion.

Test yourself

Which word fits the gap? "The guests kept a _____ silence during the speech."

Answer: decorous

In your own words, what does "decorous" mean?

Showing behavior that is polite and appropriate for the occasion.

Learn next at C1

Sources and credits

Last reviewed November 2, 2026. Report a mistake on this page

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