The Collaborative International Dictionary of English v.0.48:

Infatuation \In*fat`u*a"tion\, n. [LL. infatuatio: cf. F.
   infatuation.]
   The act of infatuating; the state of being infatuated; folly;
   that which infatuates.
   [1913 Webster]

         The infatuations of the sensual and frivolous part of
         mankind are amazing; but the infatuations of the
         learned and sophistical are incomparably more so. --I.
                                                  Taylor.
   [1913 Webster]

         Such is the infatuation of self-love.    --Blair.
   [1913 Webster]

WordNet (r) 3.0 (2006):

infatuation
    n 1: a foolish and usually extravagant passion or love or
         admiration
    2: temporary love of an adolescent [syn: puppy love, calf
       love, crush, infatuation]
    3: an object of extravagant short-lived passion