cissupremacy noun2 •Ideology that regards cis people as superior to other people (including trans people, nonbinary people, and genderfluid people), or diminishes the rights or interests of those who are not cis.Cisgender directors and writers cannot be the judge of what an authentic trans portrayal looks like because of their socialization in cissupremacy. — 2015 •Behavior (individual or systemic) in which cis people are privileged over other people in society (trans people, nonbinary people, genderfluid people).