/ Dictionary / Index M middle school: Meaning and Definition of Find definitions for: mid'dle school" Pronunciation: [key] a school intermediate between elementary school and high school, usually encompassing grades five or six through eight. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. middlescence Middlesex 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