Entry 1 sense Webster, 1913 Tetrasyllabic · Tet·ra·syl·lab·ic · IPA /ˌtɛ.tɹə.sɪˈlæ.bɪk/ 01 a. Consisting of, or having, four syllables; quadrisyllabic. 1. Consisting of, or having, four syllables; quadrisyllabic.