1A consistent stance or belief that guides one's thinking or actions; often appears as a suffix '〜主義' (-ism) naming a political or ideological position.
彼は完璧主義で、細かいミスも許さない。
He's a perfectionist and doesn't tolerate even small mistakes.
その国は長年、資本主義を採用してきた。
That country has adopted capitalism for many years.
私は無駄を嫌う主義だ。
My principle is to dislike waste.
二人は政治的な主義の違いでよく議論する。
The two of them often argue due to differing political ideologies.