Definition - What does Asamprajnata Samadhi mean?
In most Hindu yogic traditions, asamprajnyata samadhi is the highest stage of samadhi, which is a state of bliss obtained when the yogi has realized the nature of the true or higher Self and thoughts disappear. In Raja yoga, this higher state of samadhi is called nirvikalpa samadhi.
The ultimate goal of yoga is union of the individual with the higher Self and the universe. It is a state associated with samadhi in general; the eighth and final limb of yoga in Patanjali's Yoga Sutras and asamprajnyata samadhi in particular. Yoga practices, such as asanas, pranayama, mudras and meditation, are designed to help the yogi reach this ultimate state of union.
Yogapedia explains Asamprajnata Samadhi
Samadhi can be divided into several levels or stages, depending on the tradition, but asamprajnyata samadhi is typically the last and highest stage. Some believe it is synonymous with enlightenment, while others believe it leads to enlightenment. Still others believe it is a state in which the mind goes blank, freeing the yogi from all thoughts.
In traditions that recognize three levels of samadhi, those states are laja, savikalpa and asamprajnyata. Laja is a trance-like state of deep joy and peace. Savikalpa is a state in which the mind is still active, where the yogi is attached to the body and worldly distractions, but receives a glimpse of bliss. Asamprajnyata is the final state in which the mind is under control, and no longer imagines or wishes for anything. Only complete awareness remains.
In asamprajnyata, the yogi no longer sees differences because he/she sees the oneness and perfection of everything. The yogi's awareness withdraws from the three bodies - physical, astral and causal - until he/she achieves oneness with the Self or Soul. It is even said that the yogi's heartbeat and breathing stop. His/her consciousness has then reached the state of absolute non-duality in which there is no difference between the self and the universe.