Metaphysics (noun)

1. The branch of philosophy that examines the nature of reality, including the relationship between mind and matter, between substance and attribute, and between cause and effect.
2. The study of being and knowing.

Origin:

From the greek μετά (metá), meaning "beyond, after" and φυσικά (phusiká), meaning "natural things".

Examples:

1. He studied metaphysics in college.
2. The book delves into the metaphysics of time and space.
3. Her work in metaphysics helped to explain the nature of reality.
4. The debate between metaphysics and empiricism has been ongoing for centuries.
5. Metaphysics is a branch of philosophy that examines the nature of reality.