solid-state

UK: /ˌsɒlɪdˈsteɪt/ US: (sol′id stāt′)

WordReference Random House Learner's Dictionary of American English © 2025

ˈsol•id-ˈstate,  adj. [usually before a noun]

1. Electronics of or relating to electronic devices, such as crystals, that can control current without the use of moving or heated parts or vacuum gaps.

WordReference Random House Unabridged Dictionary of American English © 2025

sol•id-state  (sol′id stāt′), adj. [Electronics.]

1. Electronics designating or pertaining to electronic devices, as transistors or crystals, that can control current without the use of moving parts, heated filaments, or vacuum gaps.

• 1965–70

Collins Concise English Dictionary © HarperCollins Publishers::

solid-state noun

1. (modifier) (of an electronic device) activated by a semiconductor component in which current flow is through solid material rather than in a vacuum
2. (modifier) of, concerned with, characteristic of, or consisting of solid matter