- a person who offers views or theories on profound questions in ethics, metaphysics, logic, and other related fields.
- a person who is deeply versed in philosophy.
- a person who establishes the central ideas of some movement, cult, etc.
- a person who regulates their life, actions, judgments, utterances, etc., by the light of philosophy or reason.
- a person who is rationally or sensibly calm, especially under trying circumstances.
- an alchemist or occult scientist.
- a student, teacher, or devotee of philosophy
- a person of philosophical temperament, esp one who is patient, wise, and stoical
- (formerly) an alchemist or devotee of occult science
- a person who establishes the ideology of a cult or movement
