American English

Definition of anecdotal adjective from the Oxford Advanced American Dictionary

 

anecdotal

 adjective
adjective
NAmE//ˌænɪkˈdoʊt̮l//
 
, NAmE//‑ˈdoʊt̮l̩i//
 
 
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based on anecdotes and possibly not true or accurate anecdotal evidence Anecdotal evidence suggests there were irregularities at the polling station on the day of the election.
anecdotally
 
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adverb This reaction has been reported anecdotally by a number of patients.
See the Oxford Advanced Learner's Dictionary entry: anecdotal