تعريف ومعنى "[be] glued to {sth}"

What is the origin of the idiom "be glued to something" and when to use it?

The origin of the idiom "be glued to something" can be traced to the concept of being so engrossed in an activity or captivated by something that you are as unmovable as if you were attached or "glued" to it. It is used to describe a situation where someone is entirely engrossed or fixated on a specific activity, object, or subject. It implies a high level of concentration and dedication to the point that the individual is virtually immovable or unresponsive to other things happening around them.