Source : Free On-Line Dictionary of Computing

aliasing
     
        1.  When several different identifiers refer to the
        same object.  The term is very general and is used in many
        contexts.
     
        See {alias}, {aliasing bug}, {anti-aliasing}.
     
        2.  (Or "shadowing") Where a hardware device
        responds at multiple addresses because it only decodes a
        subset of the {address lines}, so different values on the
        other lines are ignored.
     
        (1998-03-13)