Entry 2 senses · 2 variants Webster, 1913 Sanitarian · San·i·ta·ri·an · IPA /ˌsæ.nɪˈtɛɹi.ən/ a. n. 01 a. Of or pertaining to health, or the laws of health; sanitary. 1. Of or pertaining to health, or the laws of health; sanitary. 02 n. An advocate of sanitary measures; one especially interested or versed in sanitary measures. 1. An advocate of sanitary measures; one especially interested or versed in sanitary measures.