/ Dictionary / Index M MSI: Meaning and Definition of Find definitions for: MSI Pronunciation: [key] medium-scale integration: the technology for concentrating up to a thousand semiconductor devices in an integrated circuit. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. M.S.Hyg. M.S.I.E. Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language