/ Dictionary / Index D de-acquisition: Meaning and Definition of Find definitions for: de-ac•qui•si•tion Pronunciation: (dē-ak"wu-zish'un), [key] — v.t., v.i., n. deaccession. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. deacon seat deactivate Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language