Back to meanings and their fluidity.
Lutheran is a label for various religious bodies. The largest group of Lutherans in the US have changed considerably from Luther's positions on theology and its application to life in the church. The label Lutheran is no longer sufficient to identify individuals and church bodies that adhere to Luther's original theological positions. Hence the label "confessional Lutheran" has been adopted by those who wish to distance and distinguish themselves from those who define the contemporary meaning of "Lutheran".