A word that used to mean 'gay or lesbian', probably excluding bisexual and pansexual people. Nowadays it's a catch all term used to mean 'transgender, nonbinary or gender nonconforming'.
Personally I do not like the widespread use of this term because
transgenderism and gender conformity are both issues that are important enough to be treated separately, even though they can
of course intersect. It's a bit like having a catch-all phrase that means 'woman or black person or both'. Also encourages gender essentialist thinking which is a problem on the modern 'left'.