Entry 2 senses · 2 variants Webster, 1913 Lutheran /lo͞oth'-ẽr-ən/ · Lu·ther·an · IPA /ˈluθəɹən/ a. n. 01 a. Of or pertaining to Luther; adhering to the doctrines of Luther or the Lutheran Church. 1. Of or pertaining to Luther; adhering to the doctrines of Luther or the Lutheran Church.(Eccl. Hist.) 02 n. One who accepts or adheres to the doctrines of Luther or the Lutheran Church. 1. One who accepts or adheres to the doctrines of Luther or the Lutheran Church.(Eccl. Hist.)