Definition of facetious adjective from the Oxford Advanced American Dictionary

     

    facetious

     adjective
    adjective
    NAmE//fəˈsiʃəs//
     
     
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  1. 1trying to appear amusing and intelligent at a time when other people do not think it is appropriate, and when it would be better to be serious synonym flippant
  2. 2 a facetious comment/remark Stop being facetious; this is serious.
facetiously
 
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adverb
facetiousness
 
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noun [uncountable]
See the Oxford Advanced Learner's Dictionary entry: facetious