/ Dictionary / Index I investment bank: Meaning and Definition of Find definitions for: invest'ment bank" Pronunciation: [key] a financial institution that deals chiefly in the underwriting of new securities. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. investment investment casting Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language