Definition of williamite:
(n) :
A follower of William III of England who deposed James II in the Glorious Revolution.
(adj) :
Of or relating to his followers who deposed James II in the Glorious Revolution.
(adj) :
(historical) Of or relating to the reign of William III of England from 1689 to 1702.
(n) :
A member of the Hermits of Saint William, a religious order founded by disciples of William of Maleval.
(n) :
A member of the Order of Monte Vergine, a religious order founded by disciples of William of Montevergine.
(adj) :
Of architecture or furnishings: of the style of that period.