/ Dictionary / Index A acquired immune deficiency syndrome: Meaning and Definition of Find definitions for: acquired' immune' defi"ciency syn"drome. Pronunciation: [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. acquired character acquired immunity Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language