Used with the definite article to denote the people who have been defeated, typically collective and plural in sense.
Translations
vaincuAu pluriel : les vaincus. The treaty was signed by the victors and the vanquished alike.
Le traité a été signé par les vainqueurs et les vaincus également.
Definitions
Those who have been defeated in a conflict, competition, or struggle. The treaty was signed by the victors and the vanquished alike.