Entry 1 sense Webster, 1913 Anythingarian /ĕ'nĭthĭngâʹrĭən/ · A·ny·thing·a·ri·an · IPA /ˌɛnɪθɪŋˈɛəɹɪən/ 01 n. One who holds to no particular creed or dogma. 1. One who holds to no particular creed or dogma.