What is the ethymological meaning of philosophy?

Literally, the love of, including the search after, wisdom; in actual usage, the knowledge of phenomena as explained by, and resolved into, causes and reasons, powers and laws., A particular philosophical system or theory; the hypothesis by which particular phenomena are explained., Practical wisdom; calmness of temper and judgment; equanimity; fortitude; stoicism; as, to meet misfortune with philosophy., Reasoning; argumentation., The course of sciences read in the schools., A treatise on philosophy.