Ally

1. Someone who makes the commitment and effort to recognize their privilege (based on gender, class, race, sexual identity, etc.) and work in solidarity with oppressed groups in the struggle for justice. Allies understand that it is in their own interest to end all forms of oppression, even those from which they may benefit in concrete ways.
2. An action, not an identity. Members of the advantaged group recognize their privilege and work in solidarity with oppressed groups to dismantle the systems of oppression(s) from which they derive power, privilege, and acceptance. Requires understanding that it is in their own interest to end all forms of oppression, even those from which they may benefit in concrete ways. It means taking intentional, overt, and consistent responsibility for the changes we know are needed in our society, and often ignore or leave for others to deal with; it does so in a way that facilitates the empowerment of persons targeted by oppression. This framework can be used to imply that one does not feel directly implicated by the oppression.

Source: Racial Equity Tools