Breadcrumb Home > Dictionary > Index U union catalog: Meaning and Definition of Find definitions for: un'ion cat"alog Pronunciation: [key] a catalog containing bibliographic records that indicate locations of materials in more than one library or in several units of one library. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. union card union church ✖ Related Content Daily Word Quiz: donnybrook Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language