Feminism
A good and the most accurate definition that I've heard yet, compliments of Rev. Dr. Priscilla Pope-Levison:

Feminism is the perspective that views gender as one of the most important bases of the structure and organization of the social world. Feminists argue that in most known societies this structure has granted women lower status and value than men, more limited access to valuable resources, and less autonomy and opportunity to make choices about their lives. Feminists further believe that although this gender-based world may be organized around certain biological facts, such as the exclusive capacity of men to create sperm and the exclusive capacity of women to bear children, gender inequality is rooted in the social construction of human experience, which means that it should be possible to eradicate it. Finally, feminists believe that these inequities should be eliminated and that to do this, feminists cannot simply try to do better as individuals in the social world as it exists but must work together to change the structure of the social world. Any other action means making the best of an unjust situation.

AMEN!