/ Dictionary / Index B Beni: Meaning and Definition of Find definitions for: Be•ni Pronunciation: (be'nē), [key] — n. a river flowing NE from W Bolivia to the Madeira River. ab. 600 mi. (965 km) long. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ben Hur Benicia 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