Gov·ern·or n.
 1. 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. “The governor of the town.”
 2. One who has the care or guardianship of a young man; a tutor; a guardian.
 3. Naut. A pilot; a steersman. [R.]
 4. Mach. A contrivance applied to steam engines, water wheels, and other machinery, to maintain nearly uniform speed when the resistances and motive force are variable.
 Governor cut-off Steam Engine, a variable cut-off gear in which the governor acts in such a way as to cause the steam to be cut off from entering the cylinder at points of the stroke dependent upon the engine's speed.
 Hydraulic governor Mach., a governor which is operated by the action of a liquid in flowing; a cataract.

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