Source : Webster's Revised Unabridged Dictionary (1913)

Delation \De*la"tion\, n. [L. delatio accusation: cf. F.
   d['e]lation.]
   1. Conveyance. [Obs. or Archaic]

            In delation of sounds, the inclosure of them
            preserveth them.                      --Bacon.

   2. (Law) Accusation by an informer. --Milman.