plural noun, singular Plymouth Brother
a loosely organized body of Christians founded in Plymouth, England, about 1830, having no ordained ministry, no formal creed or ritual, and accepting the Bible as the only guide.
Origin of Plymouth Brethren
First recorded in 1835–45
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British Dictionary definitions for plymouth brethren
a religious sect founded c. 1827, strongly Puritanical in outlook and prohibiting many secular occupations for its members. It combines elements of Calvinism, Pietism, and millenarianism, and has no organized ministry
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