Source : Webster's Revised Unabridged Dictionary (1913)

Titillation \Tit`il*la"tion\, n. [L. titillatio: cf. F.
   titillation.]
   1. The act of tickling, or the state of being tickled; a
      tickling sensation. --A. Tucker.

   2. Any pleasurable sensation.

            Those titillations that reach no higher than the
            senses.                               --Glanvill.

Source : WordNet®

titillation
     n 1: a tingling feeling of excitement (as from teasing or
          tickling)
     2: an agreeable arousal
     3: the act of tickling [syn: {tickle}, {tickling}]