The definition of extraordinaire is someone who is out-of-the-ordinary and extremely skilled in a particular field.
(adjective)The best chef in the entire world is an example of someone who would be described as a chef extraordinaire.
See extraordinaire in Webster's New World College Dictionary
adjective
Origin: Fr
See extraordinaire in American Heritage Dictionary 4
adjective
Origin:
Origin: French
Origin: , from Old French
Origin: , from Latin extraōrdinārius; see extraordinary
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