adj. Identifying with one's physical gender.
"We don’t call being cisgender — which is when our bodies match up with our internal sense of gender — a personal choice. Both are about being who you are," she said.
But when you have a term for one group of people, you need a word for the rest, and the one they've come up with is "cisgender". So the huge majority of us are now, "members of the cisgender community".
Issues of interest are transphobia, hostility, general knowledge and understanding, attitudes of the queer community and cisgendered people, etc.
This term combines the Latin prefix cis-, "the same side as," and gender to create an antonym for the more common term transgender, "identifying with aspects of both the male and female genders."