Mrebo said:
"Return of the Jedi" certainly refers to Luke's growth as a Jedi.
I've always thought it was referring to Vader's redemption. Leaving the Sith and returning to the Jedi. Or that it refers to Luke becoming a Jedi and therefore retuning the Jedi to the galaxy. Either way, I've always thought it was a lame title. Sounds too much like a generic sequel. Which... hmm...