Entry 2 senses · 2 variants Webster, 1913 Riddler /(rĭd"dlĭ)/ · Rid·dler · IPA /rˈɪdlər/ n. n. 01 n. One who riddles (grain, sand, etc.). 1. One who riddles (grain, sand, etc.). 02 n. One who speaks in, or propounds, riddles. 1. One who speaks in, or propounds, riddles. Phrases & compounds The Riddler — A fictional character in the Batman comic books series and also in the Batman series of movies. He was an enemy of Batman who proposed riddles.