Queer is an umbrella term for people who are not heterosexual or are not cisgender. Originally meaning 'strange' or 'peculiar', queer came to be used pejoratively against LGBT people in the late 19th century. From the late 1980s, queer activists began to reclaim the word as a neutral or positive self-description. In the 21st century, queer became increasingly used to describe a broad spectrum of non-heteronormative sexual or gender identities and politics.
https://en.wikipedia.org/wiki/Queer
Queer is an umbrella term for people who are not heterosexual or are not cisgender. Originally meaning 'strange' or 'peculiar', queer came to be used pejoratively against LGBT people in the late 19th century. From the late 1980s, queer activists began to reclaim the word as a neutral or positive self-description. In the 21st century, queer became increasingly used to describe a broad spectrum of non-heteronormative sexual or gender identities and politics.
