Source : Webster's Revised Unabridged Dictionary (1913)

Inform \In*form"\, v. t.
   1. To take form; to become visible or manifest; to appear.
      [Obs.]

            It is the bloody business which informs Thus to mine
            eyes.                                 --Shak.

   2. To give intelligence or information; to tell. --Shak.

            He might either teach in the same manner,or inform
            how he had been taught.               --Monthly Rev.

   {To inform against}, to communicate facts by way of
      accusation against; to denounce; as, two persons came to
      the magistrate, and informed against A.