Entry 1 sense Webster, 1913 Monolith /män'-əl-ĭthˌ/ · Mon·o·lith · IPA /ˈmɑn.əˌlɪθ/ 01 n. A single stone, especially one of large size, shaped into a pillar, statue, or monument. 1. A single stone, especially one of large size, shaped into a pillar, statue, or monument.