I. noun
Usage: usually capitalized R&C
: a member of the Roman Catholic Church
II. adjective
Usage: usually capitalized R&C
: of, relating to, or being a Christian church with a hierarchy headed by the pope, a usually Latin rite centering in the Mass, seven sacraments, veneration of the Virgin Mary and the saints, clerical celibacy, many religious orders, and dogma including transubstantiation and papal infallibility