[ ir-i-tey-shuh n ]
/ ˌɪr ɪˈteɪ ʃən /


the act of irritating or the state of being irritated.
something that irritates.
Physiology, Pathology.
  1. the bringing of a bodily part or organ to an abnormally excited or sensitive condition.
  2. the condition itself.

Origin of irritation

First recorded in 1580–90, irritation is from the Latin word irrītātiōn- (stem of irrītātiō). See irritate, -ion Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for irritation

British Dictionary definitions for irritation


/ (ˌɪrɪˈteɪʃən) /


something that irritates
the act of irritating or the condition of being irritated

Derived Forms

irritative, adjective
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

Medicine definitions for irritation


[ ĭr′ĭ-tāshən ]


Extreme incipient inflammatory reaction of the body tissues to an injury.
The normal response of a nerve or muscle to a stimulus.
The evocation of a reaction in the body tissues by the application of a stimulus.

Related forms

irri•ta′tive (-tātĭv) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.