What is ACREFIGHT or ACRE? Definition ofACREFIGHT or ACRE in Black's Law Dictionary
A camp or field fight; a sort of duel, or judicial combat, anciently fought by single combatants, English and Scotch, between the frontiers of the two kingdoms with sword and lance. Called "campfight," and the combatants "champions," from the open "acre" or field that was the stage of trial. Cowell.
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That's the definition of in Black's Law Dictionary - Courtesy of Cekhukum.com.