A theory introduced by American professor Kimberlee Crenshaw, which is the idea that when it comes to thinking about how inequalities persist, categories like gender, race and class are best understood as overlapping and mutually constitutive rather than isolated or distinct. It is the complex, cumulative ways in which the effects of multiple forms of discrimination (such as racism, sexism and classism) combine, overlap or intersect especially in the experiences of marginalized individuals or groups.