Entry 2 senses · 2 variants Webster, 1913 Brownism · Brown·ism · IPA n. n. 01 n. The views or teachings of Robert Brown of the Brownists. 1. The views or teachings of Robert Brown of the Brownists.(Eccl. Hist.) 02 n. The doctrines of the Brunonian system of medicine. See Brunonian. 1. The doctrines of the Brunonian system of medicine. See Brunonian.(Med.) See: Brunonian