Definition of decorum noun from the Oxford Advanced Learner's Dictionary



BrE BrE//dɪˈkɔːrəm//
; NAmE NAmE//dɪˈkɔːrəm//
[uncountable] (formal)
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polite behaviour that is appropriate in a social situation synonym propriety a sense of decorum He is not known for his sense of decorum. The celebrations were carried off with style and decorum. Word Originmid 16th cent. (as a literary term, denoting suitability of style): from Latin, neuter of the adjective decorus ‘seemly’.
See the Oxford Advanced American Dictionary entry: decorum