/ Dictionary / Index A anode dark space: Meaning and Definition of Find definitions for: an'ode dark' space" Pronunciation: [key] — Physics. Physics. the dark region between the anode glow and the anode in a vacuum tube, occurring when the pressure is low. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. anode anode glow Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language