'du shes med pa

འདུ་ཤེས་མེད་པ
[samapatti of] non-perception [Karmically impelled by it, a being born among the perceptionless gods, with cessation of mind and mental contents has one kind of non-associated [with sense-perception] formation of cessation, induced unconsciousness, or non-conception (one of the fourteen non-associated formations] [IW]

the perceptionless [gods] [RY]

without/ devoid of perception [RB]

mental blankness; x lha tshe ring po ni 'du shes med pa'i ngang dus *gron nas chos byad du mi khoms the long-lived gods have no opportunity to practise the Dharma because they spend their time in a state of mental blankness [RY]

[samapatti of] non-perception [IW]

1) without/ devoid of perception 2) state of non-conception, as one of the fourteen non-concurrent formations. induced unconsciousness, non-perceptive; nonconception [RY]

1 of snyoms par 'jug pa dgu [JV]

No concept. DKC

Discussion

A state of meditation, included within the fourth dhyana, where the meditator has no conception at all and remains in a state of blankness for many aeons, after which they will die and fall to a lower realm. Wrongly considered liberation by outsiders, it is viewed as a great abyss by Buddhist schools.

This, along with the absorption of cessation ('gog pa'i snyoms 'jug), is one of the two mind-free states. DKC