Illegal. Bad idea in case of fire. And yes, it is abuse.
Is it considered abuse to lock a teen in their room for a month? A 13 year old, with exceptions for bathroom and food.
Maybe ... Maybe not.
It depends on more than just if the child is locked in the room.
How old is the child?
Are they being fed and cared for?
Are they receiving human interaction?
Yes it is.
Are you nuts?
Let me lock you in a room for a month and then you tell me if it's abuse or not, your own Common Sense should answer this question for you.
If you are not a troll and I think you are:
What the hell were you thinking staying in the same house with a man who hit your baby? Why did you not call the police and have him removed or have them take you and your son somewhere safe right away?
It is your duty to protect that child and you failed when you stayed with him after he did that,you are enabling child abuse and you will be locked up and have your child taken from you and I hope that happens very soon.
If you are a troll:
Make an appointment to see a psychiatrist,you need serious help to even think those things up.