Source : Webster's Revised Unabridged Dictionary (1913)

Maenad \M[ae]"nad\, n. [L. Maenas, -adis, Gr. ?, ?, fr. ? to
   rave.]
   1. A Bacchante; a priestess or votary of Bacchus.

   2. A frantic or frenzied woman.

Source : WordNet®

maenad
     n 1: an unnaturally frenzied or distraught woman
     2: (Greek mythology) a woman participant in the orgiastic rites
        of Dionysus