Breadcrumb Home > Dictionary > Index C coarser: Meaning and Definition of Find definitions for: coars•er Pronunciation: (kôr'sur, kōr'-), [key] — adj. Math. of or pertaining to a topology on a topological space whose open sets are included among the open sets of a second specified topology on the space. Cf. finer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: coarser (Thesaurus) coarsen coarticulation 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: bildungsroman Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language