/ Dictionary / Index D diode: Meaning and Definition of Find definitions for: di•ode Pronunciation: (dī'ōd), [key] — n. Electronics. a device, as a two-element electron tube or a semiconductor, through which current can pass freely in only one direction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: diode (Thesaurus) Diocletian window Diodorus Siculus Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language