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.
Derivatives:
Protestantism n. Protestantize v.tr. & intr. (also -ise).
Etymology: mod.L protestans, part. of L protestari (see PROTEST)