[ ahy-oh-puh-ner ]
See synonyms for: eyeopenereyeopeners on Thesaurus.com

  1. an experience or disclosure that gives one a sudden realization or understanding: Her disclosures about her childhood were a real eyeopener.

  2. a drink of liquor taken early in the day and intended to wake a person up fully.

Origin of eyeopener

An Americanism dating back to 1810–20; eye + opener

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use eyeopener in a sentence

  • 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


  1. something startling or revealing

  2. 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