Meaning

noun one of the inherent cognitive or perceptual powers of the mind

noun the body of teachers and administrators at a school

originFrom Middle English faculte (“power, property”), from Old French faculte, from Latin facultas (“capability, ability, skill, abundance, plenty, stock, goods, property; in Medieval Latin also a body of teachers”), another form of facilitas (“easiness, facility, etc.”), from facul, another form of facilis (“easy, facile”); see facile. Doublet of facility.

Etymology from Wiktionary, CC BY-SA 3.0