The Collaborative International Dictionary of English v.0.48:

Infatuate \In*fat"u*ate\ (?; 135), a. [L. infatuatus, p. p. of
   infatuare to infatuate; pref. in- in + fatuus foolish. See
   Fatuous.]
   Infatuated. --Bp. Hall.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Infatuate \In*fat"u*ate\, v. t. [imp. & p. p. Infatuated; p.
   pr. & vb. n. Infatuating.]
   [1913 Webster]
   1. To make foolish; to affect with folly; to weaken the
      intellectual powers of, or to deprive of sound judgment.
      [1913 Webster]

            The judgment of God will be very visible in
            infatuating a people . . . ripe and prepared for
            destruction.                          --Clarendon.
      [1913 Webster]

   2. To inspire with a foolish and extravagant passion; as, to
      be infatuated with gaming.
      [1913 Webster]

            The people are . . . infatuated with the notion.
                                                  --Addison.
      [1913 Webster]

WordNet (r) 3.0 (2006):

infatuate
    v 1: arouse unreasoning love or passion in and cause to behave
         in an irrational way; "His new car has infatuated him";
         "love has infatuated her"