What term describes the belief that one gender is superior to another?

The belief that one gender is superior to another is best described by the term "sexism." This concept encompasses a wide array of beliefs and practices that reinforce the idea of gender hierarchy, often manifesting in discrimination against one gender, typically women. Sexism can lead to unequal treatment in various aspects of life, including employment, education, and social interactions.

While "chauvinism" refers to excessive or aggressive loyalty to a particular gender, often male, it does not fully encapsulate the broader societal attitudes and behaviors associated with the belief in gender superiority. "Discrimination" refers to the actions taken based on those beliefs but does not specifically denote the ideologies behind them. "Patriarchy" describes a social system where men hold primary power, but again, it is more about the structure of society rather than the belief in superiority itself. Therefore, sexism is the most accurate term to define the underlying belief in gender superiority.