Function: adjective
Date: circa 1951
1 : relating to the properties, structure, or reactivity of solid material especially : relating to the arrangement or behavior of ions, molecules, nucleons, electrons, and holes in the crystals of a substance (as a semiconductor) or to the effect of crystal imperfections on the properties of a solid substance < solid-state physics>
2 a : utilizing the electric, magnetic, or optical properties of solid materials < solid-state circuitry> b : using semiconductor devices rather than electron tubes <a solid-state radio>