(v.t.) To act in opposition to; to hinder, defeat or frustrate, by contrary agency or influence; as, to counteract the effect of medicines; to counteract good advice.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). counteract. Retrieved September 23, 2026, from http://smartdefine.org/counteract/definitions/1992190 |
| Chicago | Webster's. 2011. "counteract" http://smartdefine.org/counteract/definitions/1992190 (accessed September 23, 2026). |
| Harvard | Webster's 2011, counteract, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/counteract/definitions/1992190>. |
| MLA | Webster's. "counteract" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/counteract/definitions/1992190> |