"No-self," non-ego, egolessness, impersonality; "neither within the bodily and mental phenomena of existence nor outside of them can be found anything that in the ultimate sense could be regarded as a self-existing real ego-identity, soul or any other abiding substance."
The Buddhist notion that there is no eternal soul, unlike in Hinduism. Instead, each living person is an association of five skandas, which fly apart at death. (Linguistically, "atta" is Pali for "atman" while "an" is the negative. The term literally means "no soul.")