/ Dictionary / Index M media center: Meaning and Definition of Find definitions for: me'dia cen"ter Pronunciation: [key] a library, usually in school, that contains and encourages the use of audiovisual media and associated equipment as well as books, periodicals, and the like. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Media Atropatene mediacy Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language