the study of rigid matter, or solids, through methods such as solid-state chemistry, quantum mechanics, crystallography, electromagnetism, and metallurgy.

A solid-state battery is an electrical battery that uses a solid electrolyte for ionic conductions between the electrodes, instead of the liquid or gel polymer electrolytes found in conventional batteries.

(computing, technology) Any device which employs the electric, magnetic or optical properties of a solid, especially of semiconductors.

(computing, technology) A solid-state storage device that uses integrated circuit assemblies to store data persistently, typically using flash memory, and functioning as secondary storage in the hierarchy of computer storage.

A solid-state laser is a laser that uses a gain medium that is a solid, rather than a liquid as in dye lasers or a gas as in gas lasers.

a type of lighting that uses semiconductor light-emitting diodes (LEDs), organic light-emitting diodes, or polymer light-emitting diodes as sources of illumination rather than electrical filaments, plasma (used in arc lamps such as fluorescent lamps), or gas.

A solid state relay is an electronic switching device that switches on or off when an external voltage (AC or DC) is applied across its control terminals.

non-volatile computer storage that has no moving parts; it uses only electronic circuits.