/ Dictionary / Index A Aberdeen Proving Ground: Meaning and Definition of Find definitions for: Ab'erdeen Prov'ing Ground" Pronunciation: [key] a federal reservation and U.S. Army training center in NE Maryland, S of Aberdeen and on W Chesapeake Bay, that is the site of a military testing ground. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Aberdeen Angus Aberdeen terrier Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language