From Longman Dictionary of Contemporary EnglishCongregationalismCon‧gre‧ga‧tion‧al‧is‧m /ˌkɒŋɡrəˈɡeɪʃənəlɪzəm $ ˌkɑːŋ-/ noun [uncountable] RRCa type of Christianity in which each congregation is responsible for making its own decisions —Congregational adjective —Congregationalist noun [countable]
Examples from the Corpus
Congregationalism• His own studies led him towards a much-modified Congregationalism, with a threefold ministry of evangelists, pastors, and teachers. 