[tol-er-uh nt]
  1. inclined or disposed to tolerate; showing tolerance; forbearing: tolerant of errors.
  2. favoring toleration: a tolerant church.
  3. Medicine/Medical, Immunology.
    1. able to endure or resist the action of a drug, poison, etc.
    2. lacking or exhibiting low levels of immune response to a normally immunogenic substance.

Origin of tolerant

1770–80; < Latin tolerant- (stem of tolerāns), present participle of tolerāre to bear. See tolerate, -ant
Related formstol·er·ant·ly, adverbnon·tol·er·ant, adjectivenon·tol·er·ant·ly, adverbo·ver·tol·er·ant, adjectiveo·ver·tol·er·ant·ly, adverbqua·si-tol·er·ant, adjectivequa·si-tol·er·ant·ly, adverbself-tol·er·ant, adjectiveself-tol·er·ant·ly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for nontolerant


  1. able to tolerate the beliefs, actions, opinions, etc, of others
  2. permissive
  3. able to withstand extremes, as of heat and cold
  4. med (of a patient) exhibiting tolerance to a drug
Derived Formstolerantly, adverb
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 nontolerant



1784, from Latin tolerantia "endurance," from tolerans, present participle of tolerare "to bear, endure, tolerate" (see toleration). Related: Tolerantly.

Online Etymology Dictionary, © 2010 Douglas Harper