(a.) Having an impaired intellect; whimsical; crazy.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). crack-brained. Retrieved September 20, 2026, from http://smartdefine.org/crack-brained/definitions/1992570 |
| Chicago | Webster's. 2011. "crack-brained" http://smartdefine.org/crack-brained/definitions/1992570 (accessed September 20, 2026). |
| Harvard | Webster's 2011, crack-brained, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/crack-brained/definitions/1992570>. |
| MLA | Webster's. "crack-brained" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/crack-brained/definitions/1992570> |