There’s the definition. Can you get behind that? If not, what is your reason?
Oh, and please don’t give me an argument that this is not what feminists “really” believe. You’re not a feminist, and I am, so of the two of us I am in a better position to speak for what feminists believe. If you really can’t stomach the idea that you don’t know better than women what they actually believe, then just accept for the sake of argument that this is the definition.