(n.) One who is deficient in understanding; a witless person.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). lackbrain. Retrieved September 21, 2026, from http://smartdefine.org/lackbrain/definitions/2026098 |
| Chicago | Webster's. 2011. "lackbrain" http://smartdefine.org/lackbrain/definitions/2026098 (accessed September 21, 2026). |
| Harvard | Webster's 2011, lackbrain, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/lackbrain/definitions/2026098>. |
| MLA | Webster's. "lackbrain" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/lackbrain/definitions/2026098> |