Common meaning:

A person who feels that their gender does not match their biological sex.

Hidden meaning of the Equity religion: 

Belief that there is no such thing as a fixed gender.

Discussion:

The Equityists believe that despite what our biology says, there is no such thing as a fixed male or female gender. For them, gender is a scale with male on one end and female on the other. Everyone falls somewhere along the scale.

This idea is completely wrong. Although societies add a thin layer of gender expectations over people, the overwhelming majority of gender is created by genetics and there are only two choices.

It is important to understand that Equity is a religious virus which is trying to replicate itself and bring about the destruction of Western societies. Once this happens, so the religion says, we will be free of all oppression. This means that the promotion of transgender, in order to destroy the concept of fixed gender, is an attack on Western civilization itself.

Transgender is an illusion of the mind.