/ Dictionary / Index B base on balls: Meaning and Definition of Find definitions for: base' on balls' Pronunciation: [key] — pl. bases on balls. the awarding of first base to a batter to whom four balls have been pitched. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Basenji base pair Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language