[ri-zis-tuh nt]
See more synonyms for resistant on
  1. a person or thing that resists.

Origin of resistant

1590–1600; < Middle French resistant, present participle of resister to resist; see -ant
Related formsre·sist·ant·ly, adverban·ti·re·sis·tant, adjective, nounan·ti·re·sis·tant·ly, adverbun·re·sist·ant, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for resistant


  1. characterized by or showing resistance; resisting
    1. impervious to the action of corrosive substances, heat, etca highly resistant surface
    2. (in combination)a heat-resistant surface
  1. a person or thing that resists
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

Word Origin and History for resistant

c.1600, from French résistant, present participle of résister (see resist). In reference to diseases or drugs from 1897.

Online Etymology Dictionary, © 2010 Douglas Harper