Synchronicity is a word that Swiss psychologist Carl Jung used to describe the temporally coincident occurrences of acausal events. Jung spoke of synchronicity as an acausal connecting principle which means a pattern of connection that cannot be explained by direct causality or a meaningful coincidence.
Cause- nd effect, in Jung's mind, seemed to have nothing to do with it. Jung introduced the concept of Synchronicity as an acausal connecting principle, though he had been considering the concept for almost thirty years.
Put plainly, synchronicity is the experience of two or more occurrences beyond coincidentally in a manner that is logically meaningful but inexplicable to the person or persons experiencing them. Such events would also have to suggest an underlying pattern in order to satisfy the definition of synchronicity as developed by Jung.