/ Dictionary / Index M medivac: Meaning and Definition of Find definitions for: med•i•vac Pronunciation: (med'u-vak"), [key] — -vacked, -vack•ing. medevac. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: medivac (Thesaurus) medius medlar Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language