Breadcrumb Home > Dictionary > Index O Cite obsolescence: Meaning and Definition of Find definitions for: ob•so•les•cence Pronunciation: (ob"su-les'uns), [key] ? n. the state, process, or condition of being or becoming obsolete. Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease. See also: obsolescence (Thesaurus) obsolesce obsolescent TrendingHere are the facts and trivia that people are buzzing about. February 2021 Current Events: US News The Berlin Conference and the Partition of Africa The Implied Powers of Congress The Women's March on Versailles Keeping Your Brain Active in a COVID-19 World The Manchu Related Content Daily Word Quiz: suigeneris Analogy of the Day: Today?s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language