Breadcrumb Home > Dictionary > Index O osteoarthritis: Meaning and Definition of Find definitions for: os•te•o•ar•thri•tis Pronunciation: (os"tē-ō-är-thrī'tis), [key] — n. Pathol. the most common form of arthritis, usually occurring after middle age, marked by chronic breakdown of cartilage in the joints leading to pain, stiffness, and swelling. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: osteoarthritis (Thesaurus) osteo- osteoarthrosis 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 Preamble of the United Nations Charter The Jewish Calendar ✖ Related Content Daily Word Quiz: nosegay Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language