Source : Webster's Revised Unabridged Dictionary (1913)

Spellbind \Spell"bind`\, v. t. [imp. & p. p. {Spellbound}; p.
   pr. & vb. n. {Spellbinding}.]
   To bind or hold by, or as if by, a spell or charm; to
   fascinate, esp. by eloquence of speech, as in a political
   campaign. -- {Spell"bind`er}, n.

Source : WordNet®

spellbinder
     n : an orator who can hold his listeners spellbound