Source : WordNet®

intensional
     adj : used of the set of attributes that distinguish the referents
           of a given word

Source : Free On-Line Dictionary of Computing

intensional
     
         Intensional properties, e.g. intensional
        equality, relate to how an object is implemented as opposed to
        extensional properties which concern only how its output
        depends on its input.
     
        (1995-01-12)