Definition of abracadabra exclamation from the Oxford Advanced Learner's Dictionary

 

abracadabra

 exclamation
exclamation
BrE BrE//ˌæbrəkəˈdæbrə//
 
; NAmE NAmE//ˌæbrəkəˈdæbrə//
 
 
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a word that people say when they do a magic trick, in order to make it successful Word Origin late 17th cent. (as a mystical word engraved and used as a charm to keep away illness): from Latin, first recorded in a 2nd-cent. poem by Q. Serenus Sammonicus, from a Greek base.
See the Oxford Advanced American Dictionary entry: abracadabra