philosopher

(originally) A lover of wisdom.

A student of philosophy.

A scholar or expert engaged in or contributing to philosophical inquiry.

(archaic) A person who applies the principles of philosophy to the conduct of their life, as by acting calmly and rationally in the face of inevitable change.

(archaic) A student, scholar, or expert in any branch of knowledge, especially those branches studied prior to being considered part of pure science.

(obsolete) An alchemist.