Wikipedia defines the term "telepathy" in an excellent article that may be found at this link:
"Telepathy" comes from the Greek words tele ("distant") patheia ("feeling"). It refers to the claimed ability of humans to communicate information from one mind to another, without the use of extra tools, such as speech or body language.
Technically, the term "artificial telepathy" does not fit this definition, because "artificial" implies the use of extra tools, such as computers, microwaves and scanning devices. In its purest, most ancient, and most natural form, telepathy employs no such tools. It requires nothing but a well-trained mind.
Scientific investigation of telepathy "is generally recognized as having begun with the initial program or research of the Society for Psychical Research. The apex of their early investigations was the report published in 1886 as the two-volume work Phantasms of the Living. It was with this work that telepathy was introduced, replacing the earlier term 'thought transference."
Prior to 1886, it is difficult to find any references to the word telepathy. But the history of telepathy seems to be very ancient indeed. We find examples of mind-reading and thought transference in several ancient texts.
In the Bible, for example, we find many references to "voice hearing" and "visions" that appear in prophetic dreams. On the feast of Pentecost, the apostles of Jesus experience a "gift of tongues" that allows them to understand the speech of strangers. This could be loosely defined as Concept Telepathy.
The following article gives an excellent summary of the ancient Jewish concept of telepathy as it relates to the modern study of Kabbalah. This definition of "natural" or "spiritual" telepathy helps establish a baseline. We can use it later to understand the difference between "natural" and "artificial" telepathy: