AVATAR...What Is It?

     You'd have to be living in a cave in the woods somewhere, not to have heard about the movie "Avatar".  Because the commercials for this flick are everywhere.
     But what does "Avatar" mean?  And does this movie reflect the true meaning of the word?  One dictionary reflects, that the word, Avatar, is defined in ancient terms as "the incarnation of a Hindu deity in human or animal form."  Another dictionary  described this word as "a fully freed soul, incarnating directly from God on this physical planet or elsewhere,  to fulfill a highly spiritual task in the name of God and return to God after accomplishing this task".
     Not having seen this film, I cannot ascertain whether or not the plot of the movie reflects this definition.  So, I invite anyone, who has seen it, to "comment" to  me about their opinion in this regard.
     Having seen numerous re-plays of AVATAR movie commercials, with the prehistoric  creatures and the blue people, who inhabit that realm, my question  remains as to whether or not this movie's plot is true to the definition of the movie's title.
     Is the story line depicting a parallel universe, a vision of futuristic planet life or a reaching back into pre-history?  I would really like to know.
           HOPING  TO  HEAR  FROM  SOMEONE,  WHO  WILL COMMENT......