Entry 6 senses · 4 variants Webster, 1913 Sol /sōl/ · IPA /sɔl/ n. n. n. n. 01 n. The sun. 1. The sun. 2. Gold; -- so called from its brilliancy, color, and value.(Alchem.) 02 n. A syllable applied in solmization to the note G, or to the fifth tone of any diatonic scale. 1. A syllable applied in solmization to the note G, or to the fifth tone of any diatonic scale.(Mus.) 03 n. A sou. 1. A sou. 2. A silver and gold coin of Peru. The silver sol is the unit of value, and is worth about 68 cents. 04 n. A fluid mixture of a colloid and a liquid; a liquid colloidal solution or suspension. 1. A fluid mixture of a colloid and a liquid; a liquid colloidal solution or suspension.(Chem.)