white hopenoun [ S ]
uk/ˌwaɪt ˈhəʊp/us/ˌwaɪt ˈhoʊp/UK a person or thing that people hope will be very successful in the near future:
This new car is seen as the great white hope of the industry.
US used, especially in the past to refer to a white person who is expected to be more successful than a black or Hispanic person, for example a boxer or basketball player