Syncretism: The attempt to assimilate differing or opposite doctrines and practices, especially between philosophical and religious systems, resulting in a new system altogether in which the fundamental structure and tenets of each have been changed. Syncretism of the gospel occurs when its essential character is confused with elements from the culture. In syncretism the gospel is lost as the church simply confirms what is already present in the culture.1
1. Stanley J. Grenz, David Guretzki & Cherith Fee Nordling, Pocket Dictionary of Theological Terms (Downers Grove, IL: InterVarsity Press, 1999), p. 111.