Definitions

1. noun

an event or experience that surprises or enlightens someone, often in a shocking or unpleasant way

“The news of the layoffs was a big eyeopener for the employees.”

2. noun

a drink, especially coffee, that is drunk in the morning to help one wake up

“A cup of hot coffee is a good eyeopener on a cold winter morning.”

3. verb

to make someone understand something surprising or unpleasant

“The new policy will eyeopen many employees about the company’s financial situation.”