Tulku

"In the Tibetan tradition there are some people who are believed to be very special and are known as Tulku, literally meaning “reincarnated, but are addressed to as Rinpoche, meaning “precious.” In their past lives they were very learned Buddhist monks known for being realized persons from a Buddhist philosophical point of view. All their actions were devoted to the sake of all sentient beings. Their presence inside the various monastic communities was of great benefit for everybody, and so at the time of death their reincarnation was looked for to allow the continuation of the work they had begun in the previous life. I had the fortune to personally meet one of these very much revered figures of Tibet, to travel with Him for some months in Tibet and, in the next years in Nepal and India. His name is Chagar Tulku Rinpoche. I owe much to Him, for I would not have understood the different shades of tibetans’lifestyle without His help."
(from..http://www.negoziotibetano.it/rinpochen.htm )