aliasing

from The Free On-line Dictionary of Computing (8 July 2008)

aliasing
shadowing

   1. <jargon> 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. <hardware> (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)