D defs.my
Entry 3 senses Webster, 1913

Philosopher

/fəl-äs'-əf-ẽr/ · Phi·los·o·pher · IPA /fəˈlɑsəfəɹ/
01 n. One who philosophizes; one versed in, or devoted to, philosophy.
  1. 1.
    One who philosophizes; one versed in, or devoted to, philosophy.
    “Then certain philosophers of the Epicureans, and of the Stoics, encountered him.” — Acts xvii. 18.
  2. 2.
    One who reduces the principles of philosophy to practice in the conduct of life; one who lives according to the rules of practical wisdom; one who meets or regards all vicissitudes with calmness.
  3. 3.
    An alchemist.[Obs.]
Phrases & compounds
Philosopher's stone — an imaginary stone which the alchemists formerly sought as the instrument of converting the baser metals into gold.