There are three meanings listed in OED's entry for the noun perfectionism. See 'Meaning & use' for definitions, usage, and quotation evidence.

​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.

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.

Meaning of perfectionism in English ... the wish for everything to be correct or perfect: Obsessive perfectionism can be very irritating.

perfection · ​the state of being perfect. physical perfection; The novel achieves a perfection of form that is quite new. · ​the act of making something perfect ...

The view that the role of the state is to promote morally acceptable conceptions of the good life, rather than simply to provide a neutral or impartial ...

the act of making something perfect by doing the final improvements. They have been working on the perfection of the new model.

105,00 $ It holds that certain states of humans, such as knowledge, achievement, and friendship, are good apart from any pleasure they may bring, and that the morally ...

a person who wants everything to be perfect and demands the highest standards possible. She's such a perfectionist that she notices even the tiniest mistakes.