Breadcrumb Home > Dictionary > Index O on-line catalog: Meaning and Definition of Find definitions for: on'-line cat'alog Pronunciation: [key] a bibliographic record of a library's holdings, available in machine-readable form. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. on-line onlooker TrendingHere are the facts and trivia that people are buzzing about. Biographies: Notable Jewish Religious Leaders Current Events This Week: September 2023 Hispanic Population and the 2010 U.S. Census 50 Spookiest Halloween Quotes Preamble of the United Nations Charter The Jewish Calendar ✖ Related Content Daily Word Quiz: effete Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language