Entry 2 senses · 2 variants Webster, 1913 Cullet /(kŭl"lĕt)/ · Cul·let · IPA /ˈkʌlɪt/ n. n. 01 n. Broken glass for remelting. 1. Broken glass for remelting. 02 n. A small central plane in the back of a cut gem. See Collet, 3 (b). 1. A small central plane in the back of a cut gem. See Collet, 3 (b). See: Collet