From BiblePortal Wikipedia

Webster's Dictionary [1]

(n.) 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.

Charles Buck Theological Dictionary [2]

One who adheres to the communion of the pope and church of Rome.

See POPE, and Popery

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [3]

(Lat. papista, i.e. an adherent of the pope) is generally applied with some admixture of contempt to Roman Catholics. Of itself, the name Papist implies nothing more than that he is an adherent of the pope; but in its popular use it includes all the distinctive doctrines of the Roman Catholics, and especially those which are supposed to be peculiarly cherished by the supporters of the papal authority. It is therefore, in many cases, held to be synonymous with the profession of the most extreme opinions permitted in the Church of Rome, and even those which are popularly regarded as superstitious. Understood literally, no consistent Roman Catholic would disclaim it; but in the imputed signification explained above it is held to be offensive.