Meaning

noun a belief (or system of beliefs) accepted as authoritative by some group or school

noun the rational investigation of questions about existence and knowledge and ethics

noun any personal belief about how to live or how to deal with a situation

originFrom Middle English philosophie, Old French philosophie, and their source, Latin philosophia, from Ancient Greek φιλοσοφία (philosophía), from φίλος (phílos, “loving”) + σοφία (sophía, “wisdom”). By surface analysis, philo- + -sophy. Displaced Old English ūþwitegung.

Etymology from Wiktionary, CC BY-SA 3.0