12문의 선정 (禪定)이라는 뜻으로, 사선 (四禪), 사무량심 (四無量心), 사공정 (四空定)을 합한 것을 말함

Twelve gates of dhyana or meditation: It is a combination of Four Types of Meditation, Four Immeasurable Minds, and Four Samadhis of Emptiness.