noun
( plural plymouth brethren )
Usage: usually capitalized P&B
: a member of a religious body organized about 1830 in Plymouth, England, that takes the Bible as its sole guide, protests against sectarianism and rejects creeds and rituals, has no ordained ministry, organizes its meetings on a New Testament pattern, baptizes believers only, partakes of the Lord's Supper every Sunday, and emphasizes premillenialism