Source : Webster's Revised Unabridged Dictionary (1913)

Resolver \Re*solv"er\ (r?-z?lv"?r), n.
   1. That which decomposes, or dissolves. --Boyle.

   2. That which clears up and removes difficulties, and makes
      the mind certain or determined. --Bp. Burnet.

   3. One who resolves, or formal a firm purpose.

Source : Free On-Line Dictionary of Computing

resolver
     
         The {TCP/IP} {protocol} library software that
        formats requests to be sent to the {Domain Name Server} for
        {hostname} to {Internet address} conversion.
     
        (1995-03-28)