Breadcrumb Home > Dictionary > Index B back forty: Meaning and Definition of Find definitions for: back' for'ty Pronunciation: [key] remote, usually uncultivated acreage on a large piece of land, as on a farm or ranch. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. back formation backgammon ✖ Related Content Daily Word Quiz: restive Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language