Original sentence: In contrast to the definition of the term attributed to Hitchcock, the robot R2-D2 is important to the plot because it carries information critical to the ambitions of the various characters in the film
Edited sentence: In contrast to the usual definition of the term, R2-D2 is important to the plot and carries information critical to the ambitions of the various characters in the film.The meaning of the term used by Lucas here is at odds with the prevailing one