The word "binding" means connecting or joining together in a strong or secure way. It can refer to physically securing objects or pages together, or to a strong agreement or legal commitment. Full definition
It's okay if the shape of the heart is going out of bounds of the nail. (stylecraze.com)
Some go out of bounds by beating poor sugar baby or give them other more horrible experiences. (sugardaddysites.reviews)
The publisher adds to the hype by binding in a ribbon, suggesting that this is not simply another translation but a sacred work in its own right. (firstthings.com)