Source : Webster's Revised Unabridged Dictionary (1913)

Pasch \Pasch\, Pascha \Pas"cha\, n. [AS. pascha, L. pascha, Gr.
   ?, fr. Heb. pesach, fr. p[=a]sach to pass over: cf. OF.
   pasque, F. p[^a]que. Cf. {Paschal}, {Paas}, {Paque}.]
   The passover; the feast of Easter.

   {Pasch egg}. See {Easter egg}, under {Easter}.

   {Pasch flower}. See {Pasque flower}, under {Pasque}.

Source : WordNet®

Pasch
     n 1: the Jewish feast of the Passover [syn: {Pascha}]
     2: the Christian festival of Easter [syn: {Pascha}]