"Intersectionality is a theoretical framework for understanding how aspects of a person's social and political identities combine to create unique modes of discrimination and privilege. Intersectionality identifies advantages and disadvantages that are felt by people due to a combination of factors." - Wikipedia
Listen to this TED Talk given by Kimberlé Crenshaw who coined the term in her 1989 paper "Demarginalizing The Intersection Of Race And Sex: A Black Feminist Critique Of Antidiscrimination Doctrine, Feminist Theory And Antiracist Politics" to find out more.