What is telepathy?
This is an interesting question. It might be good to look at the etymology of the word first. Telepathy comes from two Greek words, "tele," which means distant, and "pathe," which means experience or suffering.
These Greek words were put together by Fredric W. H. Myers, in the late 1800's to speak of the ability to pass along information from one person to another person without the normal means of communication. In other words, no sensory channels are used to convey this information.
Most people do not believe in telepathy. Part of the reason for this is that it have never been proved to exists in a controlled laboratory setting. In light of this, we can say that this is the stuff of good fiction.
"Telepathy is the ability to communicate without using the five senses of hearing, touch, smell, taste, or sight." It is described as "an extremely anxious and wonderful means of communication".
It is allegedly present in all of us yet a very few of us even realize we have this skill. Telepathy is sometimes referred to as the "sixth sense". Whether this skill is used to communicate with the spirit world or something simpler such as knowing the phone is going to ring moments before it actually rings, are examples of telepathy.
It should be noted that telepathic powers and the people that claim to have these powers are both highly controversial. Some argue that the phenonenom is nothing more than basic instinct.