/ Dictionary / Index A ADC: Meaning and Definition of Find definitions for: ADC Pronunciation: [key] advanced developing countries. Aid to Dependent Children. Air Defense Command. A.D.C. Pronunciation: [key] aide-de-camp. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. A.D.B. ad captandum vulgus* Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language