Very particularly abstruse and consummately occult. The ancient philosophies were of two kinds, -- _exoteric_, those that the philosophers themselves could partly understand, and _esoteric_, those that nobody could understand. It is the latter that have most profoundly affected modern thought and found greatest acceptance in our time.

Designed for, and understood by, the specially initiated alone; not communicated, or not intelligible, to the general body of followers; private; interior; acroamatic; -- said of discussions of technical topics and of the private and more recondite instructions and doctrines of philosophers. Opposed to exoteric.

An esoteric doctrine or treatise; esoteric philosophy; esoterics.

One who believes, or is an initiate, in esoteric doctrines or rites.