/ Dictionary / Index A abundant number: Meaning and Definition of Find definitions for: abun'dant num'ber Pronunciation: [key] — Math. Math. a positive number that is less than the sum of all positive integers that are submultiples of it, as 12, which is less than the sum of 1, 2, 3, 4, and 6. Cf. deficient number, perfect number. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. abundant abundant year Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language