Definition of believer noun from the Oxford Advanced Learner's Dictionary

 

believer

 noun
noun
BrE BrE//bɪˈliːvə(r)//
 
; NAmE NAmE//bɪˈliːvər//
 
 
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  • a person who believes in the existence or truth of something, especially somebody who believes in a god or religious faith opposite unbeliever
  • Idioms
    be a (great/firm) believer in something
     
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    to believe strongly that something is good, important or valuable I’ve always been a great believer in getting as much sleep as possible.
    See the Oxford Advanced American Dictionary entry: believer