Origin: Greek suffix -ism
Gallicanism has 2 different meanings across 2 categories:
a religious movement originating among the French Roman Catholic clergy that favored the restriction of papal control and the achievement by each nation of individual administrative autonomy of the church
The principles or actions of those, within the Roman Catholic Church in France, who (especially in 1682) sought to restrict the papal authority in that country and increase the power of the national church.