1.NounThe belief that people of one sex (or gender) are inherently different from those of another sex, and generally that one sex is superior to others.
"The notion that either gender is superior is sexism."
2.NounDiscrimination against, or different treatment of, people on the basis of sex or gender, including the expectation that people should adhere to stereotypical social roles (gender roles) based on sex; discrimination against women.
"The fact that there is only one woman in a management position in that company makes it easy to believe that sexism runs rampant there.; The sexism of making and promoting violent films for men and romantic comedies for women."