The Collaborative International Dictionary of English v.0.48:

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

The Collaborative International Dictionary of English v.0.48:

Jacobite \Jac"o*bite\, prop. n. [L. Jacobus James: cf. F.
   Jacobite. See 2d Jack.]
   [1913 Webster]
   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.
      [1913 Webster]

   2. (Eccl.) One of the sect of Syrian Monophysites. The sect
      is named after Jacob Barad[ae]us, its leader in the sixth
      century.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Jacobite
    n 1: a supporter of James II after he was overthrown or a
         supporter of the Stuarts