Perfectionist

Webster's Dictionary of the English Language

·noun 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.

Related Words

perfectionist
One pretending to perfection; an enthusiast in religion.--Webster. Among the highest puritan perfec...

Dictionary of American Words And Phrases by John Russell Bartlett.