cage

A cage is a structure made with wire or bars, to hold an animal.

Example: The bird lived in a large wire cage near the window.

A cage is a something that holds things in, to protect or to keep imprisoned.

Example: Your heart is inside your rib cage.

Cage is to place something in a wire or barred structure so that they can not get out.

Example: We had to cage the lion to keep it from escaping.