/ Dictionary / Index O off-the-books: Meaning and Definition of Find definitions for: off-the-books Pronunciation: (ôf'u-books', of'-), [key] — adj. not recorded in account books or not reported as taxable income. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. off-the-board off-the-cuff Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language