- (a.) Having sufficient strength or force; founded in truth; capable of being justified, defended or supported; not weak or defective; sound; good; efficacious; as, a valid argument; a valid objection.
- (a.) Having legal strength or force; executed with the proper formalities; incapable of being rightfully overthrown or set aside; as, a valid deed; a valid covenant; a valid instrument of any kind; a valid claim or title; a valid marriage.
- (a.) Strong; powerful; efficient.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). valid. Retrieved September 20, 2026, from http://smartdefine.org/valid/definitions/2078623 |
| Chicago | Webster's. 2011. "valid" http://smartdefine.org/valid/definitions/2078623 (accessed September 20, 2026). |
| Harvard | Webster's 2011, valid, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/valid/definitions/2078623>. |
| MLA | Webster's. "valid" 28 May 2011. Web. 20 September 2026. <http://smartdefine.org/valid/definitions/2078623> |