plural of ultramontane

(theology) Respecting the supremacy of the Pope. / From the other side of a mountain range, particularly the Alps.

Someone who acknowledges the supremacy of the Pope

A Roman Catholic philosophy that emphasises the prerogatives and powers of the Pope.

plural of ultramontanism

The belief of certain Catholics, primarily during the period immediately prior to Vatican I, that papal infallibility was not restricted to a small number of papal statements but applied ipso facto (by virtue of being said by the Pope) to all papal teachings and statements.