- (a.) Hardened; indurated.
- (a.) Hardened in mind; insensible; unfeeling; unsusceptible.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). callous. Retrieved September 22, 2026, from http://smartdefine.org/callous/definitions/1983980 |
| Chicago | Webster's. 2011. "callous" http://smartdefine.org/callous/definitions/1983980 (accessed September 22, 2026). |
| Harvard | Webster's 2011, callous, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/callous/definitions/1983980>. |
| MLA | Webster's. "callous" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/callous/definitions/1983980> |