/ Dictionary / Index B blackacre: Meaning and Definition of Find definitions for: black•a•cre Pronunciation: (blak'ā"kur), [key] — n. an arbitrary name for a piece of land used for purposes of supposition in legal argument or the like (often distinguished from whiteacre). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. black acacia black alder Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language