- (a.) Pertaining to the foundation or basis; serving for the foundation. Hence: Essential, as an element, principle or law; important; original; elementary; as, a fundamental truth; a fundamental axiom.
- (n.) A leading or primary principle, rule, law or article, which serves as the groundwork of a system; essential part, as, the fundamentals of the Christian faith.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). fundamental. Retrieved September 22, 2026, from http://smartdefine.org/fundamental/definitions/2010706 |
| Chicago | Webster's. 2011. "fundamental" http://smartdefine.org/fundamental/definitions/2010706 (accessed September 22, 2026). |
| Harvard | Webster's 2011, fundamental, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/fundamental/definitions/2010706>. |
| MLA | Webster's. "fundamental" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/fundamental/definitions/2010706> |