Entry 2 senses · 2 variants Webster, 1913 Sise · IPA /saɪs/ n. n. 01 n. An assize. 1. An assize.[Obs.] 02 n. Six; the highest number on a die; the cast of six in throwing dice. 1. Six; the highest number on a die; the cast of six in throwing dice. “In the new casting of a die, when ace is on the top, sise must needs be at the bottom.” — Fuller.