More definition of hypnosis
Hypnosis is a state of inner absorption, concentration and focused attention. It is like using a magnifying glass to focus the rays of the sun and make them more powerful. Similarly, when our minds are concentrated and focused, we are able to use our minds more powerfully.

Everyone has experienced a trance many times, but we don't usually call it hypnosis. All of us have been so absorbed in thought - while reading a book, watching TV, taking the bus or driving to work - that we fail to notice what is happening around us. While we were not fully concentrating, another level of consciousness, which we refer to as our unconscious mind, takes over. These are highly focused states of attention similar to hypnosis.

Clinical hypnotherapists do essentially three things with hypnosis. They encourage the use of imagination. Mental imagery is very powerful, especially in a focused state of attention. The mind seems capable of using imagery, even if it is only symbolic, to assist us in bringing about the things we are imagining.

Another basic hypnotic method is to present ideas or suggestions to the patient. In a state of concentrated attention, ideas and suggestions that are compatible with what the patient wants seem to have a more powerful impact on the mind.