- Non-Catholic Christian - One who protests; -- originally applied to those who
adhered to Luther, and protested against, or made a solemn declaration
of dissent from, a decree of the Emperor Charles V. and the Diet of
Spires, in 1529, against the Reformers, and appealed to a general
council; -- now used in a popular sense to designate any Christian who
does not belong to the Roman Catholic or the Greek Church. - Making a protest; protesting. - Of or pertaining to the faith and practice of those
Christians who reject the authority of the Roman Catholic Church; as,
Protestant writers.