- (adv.) At what; -- used interrogatively; as, whereat are you offended?.
- (adv.) At which; upon which; whereupon; -- used relatively.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). whereat. Retrieved September 21, 2026, from http://smartdefine.org/whereat/definitions/2081614 |
| Chicago | Webster's. 2011. "whereat" http://smartdefine.org/whereat/definitions/2081614 (accessed September 21, 2026). |
| Harvard | Webster's 2011, whereat, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/whereat/definitions/2081614>. |
| MLA | Webster's. "whereat" 28 May 2011. Web. 21 September 2026. <http://smartdefine.org/whereat/definitions/2081614> |