Entry 2 senses Webster, 1913 Soothsayer /so͞othˌ-sā'-ẽr/ · Sooth·say·er · IPA /ˈsuθˌseɪɚ/ 01 n. One who foretells events by the art of soothsaying; a prognosticator. 1. One who foretells events by the art of soothsaying; a prognosticator. 2. A mantis.(Zool.)