/ ˈprɒtɪstənt; NAmE ˈprɑːt-/ noun
a member of a part of the Western Christian Church that separated from the Roman Catholic Church in the 16th century :
He's a Protestant.
► Prot·est·ant adjective :
The majority of the population is Protestant.
a Protestant church / country
► Prot·est·ant·ism / ˈprɒtɪstəntɪzəm; NAmE ˈprɑːt-/ noun [ U ]
For more information see the Cultural Guide
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WORD ORIGIN
mid 16th cent.: via German or French from Latin protestant- protesting, from Latin protestari , from pro- forth, publicly + testari assert (from testis witness).