This acronym designates people who are not heterosexual by repeating the first letter of other forms of sexuality, including:
L for lesbian
G for gay B for bisexual
T for transgender: A person whose sex at birth does not correspond to their gender identity (the opposite of cisgender: A person whose sex at birth corresponds to their gender identity).
Q for queer: A person who does not consider themselves as heterosexual or does not identify with a defined gender.
I for intersex: A person born neither male nor female.
A for asexual: A person who does not “feel the need to engage in sexual relations”
+ for all other sexual and gender identities not covered by the acronym.