Source : Webster's Revised Unabridged Dictionary (1913)

Jacobite \Jac"o*bite\, n. [L. Jacobus James: cf. F. Jacobite.
   See 2d {Jack}.]
   1. (Eng. Hist.) A partisan or adherent of James the Second,
      after his abdication, or of his descendants, an opposer of
      the revolution in 1688 in favor of William and Mary.
      --Macaulay.

   2. (Eccl.) One of the sect of Syrian Monophysites. The sect
      is named after Jacob Barad[ae]us, its leader in the sixth
      century.

Jacobite \Jac"o*bite\, a.
   Of or pertaining to the Jacobites.

Source : WordNet®

Jacobite
     n : a supporter of James II after he was overthrown or a
         supporter of the Stuarts