Eye-opener

Full definition of eye-opener

Noun

1. An experience or event that reveals, enlightens, or informs; something that causes learning, revelation, realization, or increased awareness.A visit to the slaughterhouse was a real eye-opener to anyone who thought they understood where their food came from.
2. An alcoholic beverage consumed first thing in the morning. A euphemism used by those offering or consuming alcohol in the morning.As soon as I got on the plane I asked the flight attendant for an eye-opener, but all he had to offer was orange juice.