A Christian who believes that it is extremely important to not only be a Christian, but, also to be a member of their specific denomination.
Quite a few Christians I know are Churchians. They do not like it when I visit Christian churches that are not of their denomination.
by L. E. Yah February 28, 2009
A religious person whose faith revolves around adhering to rules and traditions of organized religions -- namely, institutional versions of Christianity -- rather than around the concepts of love, tolerance, etc. that the religion actually teaches.
80% of the "Christians" in America are really just "churchians".
by Don Dueck April 15, 2006