/ Dictionary / Index M modus operandi: Meaning and Definition of Find definitions for: mo•dus op•e•ran•di Pronunciation: (mō'dus op"u-ran'dē, -dī Lat. mō'd&oomacrs ō"pe-rän'dē), [key] — pl. mo•di op•e•ran•di mode of operating or working. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. modulus of torsion modus vivendi Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language