Arupajhana means in Pali: Dhyana without form (- Rupa has), in opposition to the four Dhyana pure, but with form. It is the practice of Samatha bhavana which leads to the attack of Dhyanas. This Buddhist concept is that of an extreme state of concentration - it is already the remark which is generally made in connection with Dhyanas precedents.
Four Arupajhanas
; Infinite space: Meditating has nothing any more in him but two things: Upekkha or equanimity, and
Ekkagata or concentration - and these two factors will remain identical for the four Arupajhanas, while they varied in the first four Dhyanas. The
yogi visualizes an empty, infinite space.
; Infinite conscience: Space itself does not have any more direction. Meditating any more but the
conscience does not consider: an infinite conscience, without terminals.
; Nothing: The conscience itself is not perceived any more. It is not rare to read the assertions of one meditating as for the attack of unconscious states.
; Neither perception nor not perception: This is deepest Dhyana and most subtle. After the perception of nothing thus a state in the edge between perception and its absence comes.
See too