anatman

In Buddhist philosophy, anatta (Pāli) or anātman (Sanskrit) refers to "non-self" or "absence of separate self". One scholar describes it as "...meaning non-selfhood, the absence of limiting self-identity in people and things...". Its opposite is Atta (Pāli) or Ātman (Sanskrit), the idea of a subjective Soul or Self which survives transmigration, which the Buddha explicitly rejects. What is normally thought of as the "self" is in fact an agglomeration of constantly changing physical and mental constituents ("skandhas"). This concept has, from early times, been controversial amongst Buddhists and non-Buddhists alike and remains so to this day. In the Pali suttas and the related āgamas (referred to collectively below the nikayas) the Buddha repeatedly emphasizes not only that the five skandhas of living being are "not-self", but that clinging to them as if they were an immutable self or soul (ātman) gives rise to unhappiness.
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Anatman (Sanskrit) [from an not, non + atman soul, self, variously derived from the verbal root at to move, the verbal root an to breathe, the verbal root va to blow] Non-self, non-spirit; as an adjective, destitute of mind or spirit, corporeal. Used of the cosmos it signifies, in contrast to atman which is absolute spirit, its shadow or non-spirit, the corporeal or vehicular side of the universe, often mystically spoken of as the cosmic shadow. See also ANATTA

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."