energy band

WordReference Random House Unabridged Dictionary of American English © 2025

en′ergy band′, [Physics.]

1. Physics band (def. 10).

Collins Concise English Dictionary © HarperCollins Publishers::

energy band noun

1. a range of energies associated with the quantum states of electrons in a crystalline solid. In a semiconductor or an insulator there is a valence band containing many states, most of which are occupied. Above this is a forbidden band with only a few isolated states caused by impurities. Above this is a conduction band containing many states most of which are empty. In a metal there is a continuous valence-conduction band