/ Dictionary / Index T trans-Mississippi: Meaning and Definition of Find definitions for: trans-Mis•sis•sip•pi Pronunciation: (trans"mis-u-sip'ē, tranz"-), [key] — adj. across or beyond the Mississippi River. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. transmission stop system transmissivity Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language