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[kawr-suh n, kohr-] /ˈkɔr sən, ˈkoʊr-/
verb (used with object), verb (used without object)
to make or become coarse.
Origin of coarsen
1795-1805; coarse + -en1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for coarsen
  • Thus his name calling sets an incredibly bad example and only serves to coarsen discourse.
  • Beaches may gradually coarsen, eliminating essential surf smelt spawning substrate.
  • Euhedral pyrite cubes coarsen outward along the edge of the sample suggesting open-space growth.
  • Sediments of the outer shelf tend to coarsen with sporadic outcrops of bedrock.
  • Clasts mostly subangular to sub-rounded and coarsen toward mountain fronts.
British Dictionary definitions for coarsen


to make or become coarse
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for coarsen

1805, from coarse + -en (2). Related: Coarsened; coarsening.

Online Etymology Dictionary, © 2010 Douglas Harper
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