n. & adj.
n. 1 a member or follower of any of the western Christian Churches that are separate from the Roman Catholic Church in accordance with the principles of the Reformation. 2 (protestant) a protesting person.
adj. 1 of or relating to any of the Protestant Churches or their members etc. 2 (protestant) also protesting. Protestantism n. Protestantize v.tr. & intr. (also -ise).
[ mod.L protestans, part. of L protestari (see PROTEST) ]