/ Dictionary / Index B Banach space: Meaning and Definition of Find definitions for: Ba'nach space" Pronunciation: (bä'näkh, ban'uk), [key] — Math. Math. a vector space on which a norm is defined that is complete. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ban banal Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language