The Collaborative International Dictionary of English v.0.48:

Hypnotize \Hyp"no*tize\, v. t. [imp. & p. p. Hypnotized; p.
   pr. & vb. n. Hypnotizing.]
   To induce hypnotism in; to place in a state of hypnotism.
   [1913 Webster]

WordNet (r) 3.0 (2006):

hypnotize
    v 1: induce hypnosis in [syn: hypnotize, hypnotise,
         mesmerize, mesmerise]