Source : Webster's Revised Unabridged Dictionary (1913)

Papist \Pa"pist\, n. [F. papiste. See {Pape}, {Pope}.]
   A Roman catholic; one who adheres to the Church of Rome and
   the authority of the pope; -- an offensive designation
   applied to Roman Catholics by their opponents.

Source : WordNet®

papist
     n : a Roman Catholic who is a strong advocate of the papacy

papist
     adj : of or relating to or supporting Romanism; "the Roman
           Catholic Church" [syn: {Roman}, {r.c.}, {Romanist}, {romish},
            {Roman Catholic}, {popish}, {papistic}, {papistical}]