D defs.my
Entry 4 senses Webster, 1913

Governor

/gŭv'-ẽrn-ẽr/ · Gov·ern·or · IPA /ˈɡʌv(ə)nə(ɹ)/
01 n. One who governs; especially, one who is invested with the supreme executive authority in a State; a chief ruler or magistrate; as, the gove…
  1. 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.
  2. 2.
    One who has the care or guardianship of a young man; a tutor; a guardian.
  3. 3.
    A pilot; a steersman.(Naut.) [R.]
  4. 4.
    A contrivance applied to steam engines, water wheels, and other machinery, to maintain nearly uniform speed when the resistances and motive force are variable.(Mach.)
Phrases & compounds
Governor cut-off — 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 — a governor which is operated by the action of a liquid in flowing; a cataract.