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English definition of “smug”

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smug

adjective uk   /smʌɡ/ (smugger, smuggest) disapproving us  
too pleased or satisfied about something you have achieved or something you know: a smug grin She deserved her promotion, but I wish she wasn't so damned smug about it. There was a hint of smug self-satisfaction in her voice. He's been unbearably smug since he gave up smoking.
smugness
noun [U] uk   /ˈsmʌɡ.nəs/ us  
(Definition of smug from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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