/ Dictionary / Index D dial tone: Meaning and Definition of Find definitions for: di'al tone" Pronunciation: [key] (in a telephone) a tone that indicates the line is ready for dialing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dialogue dial train Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language