the Lost GenerationˌLost Geneˈration, the 1. the young men who were killed in World War I, who could have been successful in art, science, literature etc
2. all the people who became adults during or just after World War I, and who suffered great social and emotional disadvantages as a result
3. a group of US writers who grew up during World War I, such as Ernest Hemingway and F. Scott Fitzgerald, and who went to live in Paris in the 1920s