- (a.) Very susceptible of anger or passion; easily inflamed or exasperated; as, an irritable temper.
- (a.) Susceptible of irritation; unduly sensitive to irritants or stimuli. See Irritation, n., 3.
- (a.) Endowed with irritability; susceptible of irritation; capable of being excited to action by the application of certain stimuli.
- (a.) Capable of being irriated.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). irritable. Retrieved September 23, 2026, from http://smartdefine.org/irritable/definitions/2023844 |
| Chicago | Webster's. 2011. "irritable" http://smartdefine.org/irritable/definitions/2023844 (accessed September 23, 2026). |
| Harvard | Webster's 2011, irritable, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/irritable/definitions/2023844>. |
| MLA | Webster's. "irritable" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/irritable/definitions/2023844> |