Intersectionality is a concept often used in critical theories to describe the ways in which oppressive institutions (racism, sexism, homophobia, transphobia, ableism, xenophobia, classism, etc.) are interconnected and cannot be examined separately from one another. The concept first came from legal scholar Kimberlé Crenshaw in 1989 and is largely used in critical theories, especially Feminist theory, when discussing systematic oppression. When possible, credit Kimberlé Crenshaw for coining the term “intersectionality” and bringing the concept to wider attention.
Read on; the rest is super helpful, too: Intersectionality – Geek Feminism Wiki – Wikia