English

Definition of eye-opener noun from the Oxford Advanced Learner's Dictionary

 

eye-opener

 noun
noun
BrE BrE//ˈaɪ əʊpnə(r)//
 
; NAmE NAmE//ˈaɪ oʊpnər//
 
[usually singular]
 
jump to other results
an event, experience, etc. that is surprising and shows you something that you did not already know Travelling around India was a real eye-opener for me.
See the Oxford Advanced American Dictionary entry: eye-opener