Like the term “sexual orientation,” the word “cisgender” is freighted with false ideas about sex and human nature. Christians should use the term only for very limited purpose, such as in quotations, lest we are subtly conformed to worldly thought.
This term is used to describe people whose biology and gender identity match, according to ordinary social expectations. Biological males who present as men are “cisgender,” as are biological females who present as women.
This term is inextricable from two larger overall projects of the sexual revolution. First, this term is bound up with the claim that biological sex does not determine anything about “gender”—that is, the social role and expectations that people adopt according to their sex. Second, this term helps to classify people according to their level of privilege in society. It is often said that cisgendered, straight, white, males are privileged and powerful, while gender-queer people are marginalized and low-status.
Both of these underlying ideas are false. The link between biology and social role is far too universal to come from a mere social convention or construct. No matter how many people insist that men and women can both be “birthing persons,” it is no accident that women generally have a more domestic role in society, and men a more outwardly-focused role. Biology and social role are deeply connected. They are both parts of human nature.