Keeping the title a bit vague as not to spoil the movie.
In The Wolverine, was Logan dreaming or hallucinating,
when he was with Jean Gray/Phoenix?
Jean Gray/Phoenix some sort of a ghost that was interacting with Logan?
This is left ambiguous in the movie. It could relate to the Phoenix storyline where she appears briefly at different times until she is reborn.
Repeated references to nightmares in the film, Logan was dreaming of his love for Jean.
Logan was definitely just hallucinating every time he saw Jean after he was forced to kill her. Hope this helps!
i believe she was really there in his head, talking to him before she was reborn, from what i found out about jean grey as the phoenix, is that when she is killed she has said the she is in some kind of white room before being resurrected, and i believe that's what it was at the end of movie the last time we see her talking to wolverine. so that makes me think she is really there with him.