sexism

sexism

noun  sex·ism \ˈsek-ˌsi-zəm\

Simple Definition of sexism

: unfair treatment of people because of their sex; especially : unfair treatment of women

Source: Merriam-Webster's Learner's Dictionary

Full Definition of sexism

1:  prejudice or discrimination based on sex; especially :  discrimination against women

2:  behavior, conditions, or attitudes that foster stereotypes of social roles based on sex

sexist \ˈsek-sist\ adjective or noun

Source: Merriam-Webster
http://www.merriam-webster.com/dictionary/sexism