'Perfectionist' definitions:

Definition of 'perfectionist'

From: WordNet
noun
A person who is displeased by anything that does not meet very high standards

Definition of 'Perfectionist'

From: GCIDE
  • Perfectionist \Per*fec"tion*ist\, n.
  • 1. One pretending to perfection; esp., one pretending to moral perfection; one who believes that persons may and do attain to moral perfection and sinlessness in this life. --South. [1913 Webster]
  • 2. A person who insists on perfect results from himself or from others, in any endeavor. [PJC]

Synonyms of 'perfectionist'

From: Moby Thesaurus