Reverse discrimination is a term used to describe discrimination against members of a dominant or majority group, in favor of members of a minority or historically disadvantaged group. Wikipedia

discrimination against members of a dominant or majority group Wikidata

A policy that takes factors including race, color, religion, sex or national origin into consideration in order to benefit an underrepresented group, usually as a means to counter discrimination. OmegaWiki

The policy or practice of discriminating against members of a designated group which has in the past unfairly received preferential treatment in social, legal, educational, or employment situations, with the intention of benefiting one or more other groups (such as racial, disabled, or gender groups) that have previously been discriminated against. Wiktionary

Advantaging minority groups who have traditionally been discriminated. Wiktionary (translation)