Feminism: Some definitions

On the first day of class, I asked you to define feminism. Here are a few defintions to compare yours to:

Oxford Concise Dictionary of Politics:
Feminism is a way of looking at the world which women occupy from the perspective of women. It has as its central focus the concept of patriarchy which can be described as a system of male authority which oppresses women through its social, political, and economic institutions.

Chambers Dictionary:
Advocacy of women's rights or of the movements for the advancement of emancipation of women.

Rebecca West:
People call me a feminist whenever I express sentiments that differentiate me from a doormat.

A political interpretation of the condition of being a woman and it urges the recognition of that condition as the basis for political identity.

A movement to end sexism, sexist exploitation, and oppression.