Noun
(LGBT, neologism) 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.
Behavior (individual or systemic) in which cis people are privileged over other people in society (trans people, nonbinary people, genderfluid people).
Source: en.wiktionary.org