Solid state, or solid matter, is one of the four fundamental states of matter. Solid state may also refer to: Electronics Solid-state electronics, circuits built of solid materials Solid state ionics, study of ionic conductors and their uses Solid-state drive, a computer drive Music Solid State Records, a Christian music label Solid State Records (jazz label), active in the 1960s Solid State, a music group featuring DJ Dextrous Solid State (Leon Russell album), 1984 Solid State (Jonathan Coulton album), 2017 Solid State, an album by Sam Phillips Science Solid-state chemistry, the study of the synthesis, structure, and properties of solid phase materials Solid-state physics, the study of rigid matter, or solids, through methods such as quantum mechanics, crystallography, electromagnetism, and metallurgy See also