Definition of perfectionist noun from the Oxford Advanced Learner's Dictionary

 

perfectionist

 noun
noun
BrE BrE//pəˈfekʃənɪst//
 
; NAmE NAmE//pərˈfekʃənɪst//
 
(sometimes disapproving)
 
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a person who likes to do things perfectly and is not satisfied with anything less He was a perfectionist in his art and could be difficult to work for. perfectionist standards To reach that level of playing you have to be an absolute perfectionist.
See the Oxford Advanced American Dictionary entry: perfectionist