(v.t.) To render invalid; to weaken or lessen the force of; to destroy the authority of; to render of no force or effect; to overthrow; as, to invalidate an agreement or argument.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). invalidate. Retrieved September 23, 2026, from http://smartdefine.org/invalidate/definitions/2023373 |
| Chicago | Webster's. 2011. "invalidate" http://smartdefine.org/invalidate/definitions/2023373 (accessed September 23, 2026). |
| Harvard | Webster's 2011, invalidate, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/invalidate/definitions/2023373>. |
| MLA | Webster's. "invalidate" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/invalidate/definitions/2023373> |