[ ir-i-tnt ]
See synonyms for irritant on
  1. tending to cause irritation; irritating.

  1. anything that irritates.

  2. Physiology, Pathology. a biological, chemical, or physical agent that stimulates a characteristic function or elicits a response, especially an inflammatory response.

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Origin of irritant

1630–40; <Latin irrītant- (stem of irrītāns), present participle of irrītāre to irritate; see -ant

Other words from irritant

  • ir·ri·tan·cy, noun
  • non·ir·ri·tan·cy, noun
  • non·ir·ri·tant, adjective
  • un·ir·ri·tant, adjective

Words Nearby irritant Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use irritant in a sentence

British Dictionary definitions for irritant


/ (ˈɪrɪtənt) /

  1. causing irritation; irritating

  1. something irritant

Derived forms of irritant

  • irritancy, noun

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