Source : Webster's Revised Unabridged Dictionary (1913)

   {Holy water} (Gr. & R. C. Churches), water which has been
      blessed by the priest for sacred purposes.

   {Holy-water stoup}, the stone stoup or font placed near the
      entrance of a church, as a receptacle for holy water.

   {Holy Week} (Eccl.), the week before Easter, in which the
      passion of our Savior is commemorated.

   {Holy writ}, the sacred Scriptures. `` Word of holy writ.''
      --Wordsworth.

Source : WordNet®

holy water
     n : water that has been blessed by a priest for use in symbolic
         purification