Definition of skeptical adjective from the Oxford Advanced American Dictionary

 

skeptical

 adjective
adjective
NAmE//ˈskɛptɪkl//
 
skeptical (about/of something)
 
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having doubts that a claim or statement is true or that something will happen I am skeptical about his chances of winning. The public remain skeptical of these claims. She looked highly skeptical.
skeptically
 
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NAmE//ˈskeptɪkli//
 
adverb The announcement was greeted skeptically by the press.
See the Oxford Advanced Learner's Dictionary entry: skeptical