1. events, facts, or experiences that are surprising or enlightening
Usage: plural form; informal
2. alcoholic drinks consumed early in the morning
Usage: plural form; informal; slang

Examples

• The documentary about climate change contained several real eyeopeners.
• Her first day at the new job was full of eyeopeners about company culture.
• The statistics on poverty were genuine eyeopeners for the students.
• Living abroad provided many eyeopeners about different ways of life.
• The investigation revealed eyeopeners about corruption in the industry.
• His travel experiences were eyeopeners that changed his perspective completely.