Definition of governor

• n. - One who governs; especially, one who is invested with the supreme executive authority in a State; a chief ruler or magistrate; as, the governor of Pennsylvania.
• n. - One who has the care or guardianship of a young man; a tutor; a guardian.
• n. - A pilot; a steersman.
• n. - A contrivance applied to steam engines, water wheels, and other machinery, to maintain nearly uniform speed when the resistances and motive force are variable.