Queer comes from the English language and means weird, peculiar, strange. It was often used synonymously with pervert. In this sense, queer was used for a long time as an insult for homosexual men. The term was reinterpreted positively and used as a self-designation in connection with the gay and lesbian movement since the 1980s, starting in the USA. Today, the term queer is widely established and is also used in politics and science. With the help of this term, polymorphous ways of living and thinking are bundled together that move beyond the heteronormative spectrum and also stand for sexualities that cannot be defined by the terms homosexual, heterosexual or bisexual, for example.