[dek-er-uhs, dih-kawr-uhs, -kohr-]
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Origin of decorous

1655–65; < Latin decōrus seemly, becoming, derivative of decus; see decorate, -ous
Related formsdec·o·rous·ly, adverbdec·o·rous·ness, nounnon·dec·o·rous, adjectivenon·dec·o·rous·ly, adverbnon·dec·o·rous·ness, nounun·dec·o·rous, adjectiveun·dec·o·rous·ly, adverbun·dec·o·rous·ness, noun

Synonyms for decorous

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Antonyms for decorous Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for decorous


  1. characterized by propriety in manners, conduct, etc
Derived Formsdecorously, adverbdecorousness, noun

Word Origin for decorous

C17: from Latin decōrus, from decor elegance
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

Word Origin and History for decorous

1660s, from Latin decorus "becoming, seemly, fitting, proper," from decus (genitive decoris) "ornament" (see decorate). Related: Decorously; decorousness.

Online Etymology Dictionary, © 2010 Douglas Harper