Wordnet 3.0
NOUN (1)
1.
a disposition to feel that anything less than perfect is unacceptable;
- Example: "his perfectionism seemed excessive to his students"
The Collaborative International Dictionary of English v.0.48:
Perfectionism \Per*fec"tion*ism\, n.
1. The doctrine of the Perfectionists.
[1913 Webster]
2. A personal attitude which demands perfection in the
results of actions.
[PJC]
WordNet (r) 3.0 (2006):
perfectionism
n 1: a disposition to feel that anything less than perfect is
unacceptable; "his perfectionism seemed excessive to his
students"