Definition of debunk verb from the Oxford Advanced American Dictionary

 

debunk

 verb
verb
NAmE//ˌdiˈbʌŋk//
 
debunk somethingVerb Forms present simple I / you / we / they debunk
 
he / she / it debunks
 
past simple debunked
 
-ing form debunking
 
 
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to show that an idea, a belief, etc., is false; to show that something is not as good as people think it is His theories have been debunked by recent research.
See the Oxford Advanced Learner's Dictionary entry: debunk