Well I don't have an official definition of hypnosis, but I know what EMDR is, and it is not hypnosis. In fact it is an old myth started by people who really didn't do their research a long time ago.

During EMDR, you are not in a relaxed state, you are thinking of the traumatic
memory, you are feeling it, smelling it, reliving it, and it is nothing is relaxing about it because it is like re experiencing it again, but only with the safety of the T with you.
But this only last for a minute or two because the memories become desensitized rather quickly. You are in complete control (except for the following the fingers of the T). Usually the T will follow with a positive message for you to believe and do the EMDR much slower to end the session.