Meanings of vicious disposition in English

This is caused by the jealous and vicious disposition of the male.

A broad forehead, high between the ears, indicates a very vicious disposition.

You show a naturally vicious disposition.

Without one vicious disposition, I have fallen into a hundred vices; I have never been actively selfish, yet always selfish.

The Egyptians, who were ignorant of the presence of the Turkish regular infantry, had adopted this vicious disposition against their irregular cavalry.

Slaveholders appear to me to take the same notice of the vices of the slave, as one does of the vicious disposition of his horse.