That which makes the eyes open, as startling news or occurrence or (U. S. Slang), a drink of liquor, especially the first one in the morning.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). eye opener. Retrieved September 23, 2026, from http://smartdefine.org/eye_opener/definitions/2006565 |
| Chicago | Webster's. 2011. "eye opener" http://smartdefine.org/eye_opener/definitions/2006565 (accessed September 23, 2026). |
| Harvard | Webster's 2011, eye opener, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/eye_opener/definitions/2006565>. |
| MLA | Webster's. "eye opener" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/eye_opener/definitions/2006565> |