an assembly of persons brought together for common religious worship.
2.
the act of congregating or the state of being congregated.
3.
a gathered or assembled body; assemblage.
4.
an organization formed for the purpose of providing for worship of God, for religious education, and for other church activities; a local church society.
c.1340, "a gathering, assembly," from Fr. congrégation, from O.Fr. congregacion (12c.), from L. congregationem, noun of action from congregare (see congregate). Used by Tyndale to translate Gk. ekklesia in New Testament and by some Old Testament translators in
place of synagoge. (Vulgate uses a variety of words in these cases, including congregatio but also ecclesia, vulgus, synagoga, populus.) Protestant reformers in 16c. used it in place of church; hence the word's main modern sense of "local society of believers" (1520s).