Philosopher (noun)

1. A person who studies or writes about philosophy, the study of the fundamental nature of knowledge, reality, and existence.
2. A person who seeks wisdom or enlightenment, especially through contemplation and self-reflection.

Origin:

From old french filosofe, from latin philosophus, from ancient greek φιλόσοφος (philósophos, "lover of wisdom"), from φιλέω (philéō, "i love") + σοφία (sophía, "wisdom").

Examples:

1. He is a renowned philosopher and has written several books on the subject.
2. The ancient Greek philosophers were known for their ideas on politics, ethics, and metaphysics.
3. She is a philosopher by profession and teaches at the university.
4. He considers himself a philosopher and spends most of his time contemplating and seeking wisdom.
5. The philosopher's ideas on the meaning of life have been widely debated and discussed.