Entry 3 senses · 2 variants Webster, 1913 Tellurian · Tel·lu·ri·an · IPA /tɛˈl(j)ʊ.ɹi.ən/ a. n. 01 a. Of or pertaining to the earth. 1. Of or pertaining to the earth. 02 n. A dweller on the earth. 1. A dweller on the earth. 2. An instrument for showing the operation of the causes which produce the succession of day and night, and the changes of the seasons.