/ Dictionary / Index M midsection: Meaning and Definition of Find definitions for: mid•sec•tion Pronunciation: (mid'sek"shun), [key] — n. the middle section or part of anything. the solar plexus; midriff: a hard right to the midsection. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: midsection (Thesaurus) midsagittal plane midship Related Content Daily Word Quiz: jaundice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language