- (a.) Irritating; producing irritation or inflammation.
- (n.) Any agent by which irritation is produced; as, a chemical irritant; a mechanical or electrical irritant.
- (n.) A poison that produces inflammation.
- (a.) Rendering null and void; conditionally invalidating.
- (n.) That which irritates or excites.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). irritant. Retrieved September 25, 2026, from http://smartdefine.org/irritant/definitions/2023848 |
| Chicago | Webster's. 2011. "irritant" http://smartdefine.org/irritant/definitions/2023848 (accessed September 25, 2026). |
| Harvard | Webster's 2011, irritant, Smart Define, viewed 25 September, 2026, <http://smartdefine.org/irritant/definitions/2023848>. |
| MLA | Webster's. "irritant" 27 May 2011. Web. 25 September 2026. <http://smartdefine.org/irritant/definitions/2023848> |