Feminism is a movement to end sexism, sexist exploitation, and oppression. I agree with this definition because it is very general, and seems to cover the entirety of feminism.
In my own words, feminism is a word used to describe the movement to combat unfair treatment of women, compared to men. The issues that should be tackled first is the gap of fairness between women of color and white women. Secondly, the pay gap between men and women should be dealt with. Thirdly, unconscious means, such as language and treatments should be dealt with.