- (a.) Relating to the reason; not physical; mental.
- (a.) Having reason or the faculty of reasoning; endowed with reason or understanding; reasoning.
- (a.) Expressing the type, structure, relations, and reactions of a compound; graphic; -- said of formulae. See under Formula.
- (a.) Agreeable to reason; not absurd, preposterous, extravagant, foolish, fanciful or the like; wise; judicious; as, rational conduct; a rational man.
- (n.) A rational being.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). rational. Retrieved September 20, 2026, from http://smartdefine.org/rational/definitions/2052746 |
| Chicago | Webster's. 2011. "rational" http://smartdefine.org/rational/definitions/2052746 (accessed September 20, 2026). |
| Harvard | Webster's 2011, rational, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/rational/definitions/2052746>. |
| MLA | Webster's. "rational" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/rational/definitions/2052746> |