/ Dictionary / Index M mid-size: Meaning and Definition of Find definitions for: mid-size Pronunciation: (mid'sīz"), [key] — adj. (of an automobile) being between a compact and a large car in size and having a combined passenger and luggage volume of 110–120 cu. ft. (3.1–3.4 m). intermediate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. midships midsole Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language