Definition of extraordinaire adjective from the Oxford Advanced Learner's Dictionary

 

extraordinaire

 adjective
adjective
BrE BrE//ɪkˌstrɔːdɪˈneə(r)//
 
; NAmE NAmE//ɪkˌstrɔːrdɪˈner//
 
(from French, approving, often humorous)
 
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used after nouns to say that somebody is a good example of a particular kind of person Houdini, escape artist extraordinaire Word Origin 1940s: French, ‘extraordinary’.
See the Oxford Advanced American Dictionary entry: extraordinaire