Definition of Walter Mitty noun from the Oxford Advanced American Dictionary

 

Walter Mitty

 noun
noun
NAmE//ˌwɔltər ˈmɪt̮i//
 
 
jump to other results
a person who imagines that their life is full of excitement and adventures when it is in fact just ordinary My client is very much a Walter Mitty character. I was living in a sort of Walter Mitty world. From the name of the main character in James Thurber's story The Secret Life of Walter Mitty.
See the Oxford Advanced Learner's Dictionary entry: Walter Mitty