Use 'spellbound' when someone is so deeply focused on something that they ignore everything else. During the magic show, the children were spellbound, oblivious to the world around them.
Pro Tip 2/3
Visual Captivation
'Spellbound' often describes a visual experience that completely captures one's attention. The audience was spellbound by the stunning visual effects of the film.
Pro Tip 3/3
Intense Reaction
The word conveys a strong emotional reaction, not just ordinary interest. She watched the ballet dancer's performance, completely spellbound by his grace.