The difference between meditation and hypnosis
Great question,
There are many types of meditation and many types of hypnosis and trance and I could suggest that meditation is a form of hypnosis and hypnosis is a form of meditation - but that doesn't really answer your question!
My own description is that both are a change of focus of attention. In meditation while you may focus on a word, or your breathing, you are aware of and accept what ever comes from your internal and external environment.
In hypnosis you tend to dissociate from your current internal and external environment and be drawn into an altered safe state.
Both can be incredibly useful,
A great resource for meditation is
Shinzen Young The Science of Meditation in Action
Interested in others views,