What is Mesmerize? According to dictionary, it says “to have someone’s attention completely so that they cannot think of anything else.”
Yes, this is exactly what hypnosis is about. During hypnosis, the person’s attention is focused on one thing (the hypnotherapist’s voice or stage hypnotist’s voice). Though she can still hear and knows what is going around her, the focus is still on the therapist’s words.
There are several occasions that we can be mesmerized. Eg. Mesmerize by a book, a person (like seeing your idol singer performs), a task and nature. This is hypnosis in action.