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church planting

n. The establishment of a new local church.

Wikipedia
Church planting

Church planting is a process that results in a new (local) Christian church being established. It should be distinguished from church development, where a new service, new worship center or fresh expression is created that is integrated into an already established congregation. For a local church to be planted, it must eventually have a separate life of its own and be able to function without its parent body, even if it continues to stay in relationship denominationally or through being part of a network.