(名數)又名八背捨,違背三界之煩惱而捨離之,解脫其繫縛之八種禪定也。觀無量壽經曰:「三明六通,具八解脫。」同天台疏中曰:「能脫心慮,故名解脫,亦名背捨。背者背彼淨潔五欲也,捨者捨是著心也。」