/ Dictionary / Index Z zener diode: Meaning and Definition of Find definitions for: ze'ner di"ode Pronunciation: (zē'nur), [key] — Electronics. Electronics. a semiconductor diode across which the reverse voltage remains almost constant over a wide range of currents, used esp. to regulate voltage. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. zendo Zenger Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language