n [ sing ]
1. a generation (= group of people born at about the same time) with many of its young men killed in war, especially World War I , or one which has suffered emotional damage by growing up during war.
2. a group of young US writers of the 1920s, among them Ernest Hemingway , who were opposed to the moral values of US life in the period following World War I and went to live abroad, especially in Paris.