Definition of decorous adjective from the Oxford Advanced American Dictionary

     

    decorous

     adjective
    adjective
    NAmE//ˈdɛkərəs//
     
    (formal)
     
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  1. 1polite and appropriate in a particular social situation; not shocking synonym proper
  2. 2 a decorous kiss
 
adverb They sipped their drinks decorously.
See the Oxford Advanced Learner's Dictionary entry: decorous