1. (n.) The knowledge of phenomena as explained by, and resolved into, causes and reasons, powers and laws.

2. (n.) A particular philosophical system or theory; the hypothesis by which particular phenomena are explained.

3. (n.) Practical wisdom; calmness of temper and judgment; equanimity; fortitude; stoicism; as, to meet misfortune with philosophy.

4. (n.) Reasoning; argumentation.

5. (n.) The course of sciences read in the schools.

6. (n.) A treatise on philosophy.