/ Dictionary / Index D dead air: Meaning and Definition of Find definitions for: dead' air' Pronunciation: [key] the loss or suspension of the video or audio signal during a television or radio transmission. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dead dead-air space Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language