Basic Meaning
Though it can simply be used as the expression "I" or "me", in Indian thought the notion of self refers to a permanent, unchanging entity, such as that which passes from life to life in the case of people, or the innate essence (svabhāva) of phenomena.
Has the sense of
The notion of ātman is often equated with the Western notions of an eternal soul.
See page 78: In Sanskrit, “self’ or “I,” with a similar range of meanings as the terms possess in English, but used especially to refer to a perduring substratum of being that is the agent of actions, the possessor of mind and body (nāmarūpa), and that passes from lifetime to lifetime.
essence, self-entity, identity.
On this topic