即擇滅與非擇滅二種無為法。以智慧之簡擇力斷滅煩惱，稱為擇滅，亦即涅槃。不依擇力而得滅者，能妨礙缺自生緣之法，令其畢竟不生，稱為非擇滅。擇滅者，聖道所得；非擇滅者，緣缺所得。〔俱舍論卷一、成唯識論述記卷二末〕

二滅  "Two kinds of extinction." These are: (1) extinction due to the practice of analytical meditation; (2) extinction according to the originally quiescent nature.

（名數）一擇滅，二非擇滅也。【又】有餘涅槃與無餘涅槃也。