Definition of "solid state" [solid state]

• Of, or relating to the physical properties of solid materials, especially electromagnetic, thermodynamic or structural properties of crystalline solids. (adjective)
• Of, or relating to semiconductor materials, components and related devices; as distinct from older technologies such as vacuum tubes. (adjective)

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• "Also attached to the fusion-cell is an ancient comlog, an antique with a solid state interior and a liquid crystal diskey."