The definition of spellbound is being under the control of or fascinated by something.
An example of spellbound is some who has taken a magic "truth" potion.
held or affected by or as by a spell; fascinated; enchanted
Origin of spellboundspell + bound
Past tense of spellbind
Entranced by or as if by a spell; fascinated.
(comparative more spellbound, superlative most spellbound)