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English definition of “facetious”

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facetious

adjective uk   /fəˈsiː.ʃəs/ disapproving us  
not serious about a serious subject, in an attempt to be funny or to appear clever : facetious remarks He's just being facetious.
facetiously
adverb uk   /-li/ us  
facetiousness
noun [U] uk   /-nəs/ us  
(Definition of facetious from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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