an experience or disclosure that gives one a sudden realization or understanding: Her disclosures about her childhood were a real eyeopener.
a drink of liquor taken early in the day and intended to wake a person up fully.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use eyeopener in a sentence
This attack, coming just days after the PlayStation DDoS, was certainly an eye-opener.
But to have a respected party voice like Ayres assess the situation so harshly has got to be an eye-opener.
“That was the eye opener for us—how widely brain regions are connected to one another” in the depressed patients, he said.Depression Is Linked to Hyperconnectivity of Brain Regions, a New Study Shows | Casey Schwartz | February 21, 2012 | THE DAILY BEAST
No doubt, missionary life was an eye-opener for the privileged young Mitt.Mitt Romney's 'Missionary in France' Tale Won't Make Us Forget He's Rich | Michelle Cottle | December 15, 2011 | THE DAILY BEAST
They had never seen me really dressed up before; Barney said it was an eye-opener.Children of the Whirlwind | Leroy Scott
I told him that if he had used a little skunk eye-opener, he probably would have seen some deer.Fifty Years a Hunter and Trapper | Eldred Nathaniel Woodcock
He would also have poured down an eye-opener consisting of half a water glass of fine Champagne brandy.The Eyes Have It | Gordon Randall Garrett
Three cards is too much to hold out on smart men, as a 'full' is too big to be held often without acting as an eye-opener.Sharps and Flats | John Nevil Maskelyne
It'll be an eye-opener to the enemy to discover us gone when the flames die down.Under the Chinese Dragon | F. S. Brereton
British Dictionary definitions for eye-opener
something startling or revealing
US and Canadian an alcoholic drink taken early in the morning
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012