Stubborn means, that no matter what, you will not change your mind, or it can mean you are resistant. Like if someone wants you to try something and you refuse, no matter how hard they try to convince you, you won't . Sometimes this can be a quality, as in refusing to experiment with drugs, or it can be negative, as in you won't budge, when all the family wants to go somewhere and you're the only one who doesn't.
