- (n.) Quickness of apprehension; readiness in learning; docility; as, an aptness to learn is more observable in some children than in others.
- (n.) Fitness; suitableness; appropriateness; as, the aptness of things to their end.
- (n.) Disposition of the mind; propensity; as, the aptness of men to follow example.
- (n.) Proneness; tendency; as, the aptness of iron to rust.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). aptness. Retrieved September 20, 2026, from http://smartdefine.org/aptness/definitions/1975343 |
| Chicago | Webster's. 2011. "aptness" http://smartdefine.org/aptness/definitions/1975343 (accessed September 20, 2026). |
| Harvard | Webster's 2011, aptness, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/aptness/definitions/1975343>. |
| MLA | Webster's. "aptness" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/aptness/definitions/1975343> |