Licntenant governor
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
In English law
A deputy-governor, acting as the chief civil officer of one of several colonies under a governor general.
Webster.
In American law
An officer of a slate, sometimes charged with special duties, but chiefly important as the deputy or substitute of the governor, acting in the place of the governor upon the latter's death, resignation, or disability.