What is the legal definition of "joint custody" of a child?

What is the legal definition of "joint custody" of a child?

If you have sole custody of someone, that means that you have 100% custody. You can have sole legal custody, or sole physical custody. Alternatively, you can have joint physical custody or joint legal custody. So sole custody versus joint custody is just whether you split this custody with someone. But what is more important is legal custody versus physical custody. But I can tell you, generally the order I've seen is that the parents will have joint legal custody unless one person is incarcerated, or otherwise not capable of making legal decisions. You're always going to be able to participate in the decision-making power of that child. Physical custody is usually joint as well, if you're living in the same vicinity. It's going to be three days here, three days there, or every other weekend. Something like that.