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English definition of “skeptic”

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noun [C] uk mainly US ( UK usually sceptic)   /ˈskep.tɪk/ us  
a person who doubts the truth or value of an idea or belief: People say it can cure colds, but I'm a bit of a skeptic. to convince the skeptics
(Definition of skeptic from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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