Femininity and whiteness dominate Western nursing, silencing ontologies and epistemologies that do not align with these dominant norms while perpetuating systemic racism and discrimination in nursing practice, education, research, nursing activism, and sociopolitical structures. We propose Black feminist thought as a praxis to decenter, deconstruct, and unseat these ideologies and systems of power. Drawing from the work of past and present Black feminist scholars, we examine the ontological and epistemological perspectives of Black feminist thought. These include (i) the uniqueness and (...) particular experiences of people, (ii) the acceptance of ontological and epistemological pluralism of truths and ways of knowing, and (iii) the mandate for equity in the health, social, political, and environmental structures of society. By focusing our attention on lived experiences and voices of those systematically excluded in nursing practice, education, research, and society, Black feminist thought offers an anticolonial, antiracist, and antidiscriminatory foundation for more effectively upholding nursing's disciplinary mandate for social justice and equity. (shrink)