syn·chro·nic·i·ty Date: circa 1889 1 : the quality or fact of being synchronous 2 : the coincidental occurrence of events and especially psychic events (as similar thoughts in widely separated persons or a mental image of an unexpected event before it happens) that seem related but are not explained by conventional mechanisms of causality — used especially in the psychology of C. G. Jung
Jung believed the traditional notions of causality were incapable of explaining some of the more improbable forms of coincidence
Where it is plain, felt Jung, that no causal connection can be demonstrated between two events, but where a meaningful relationship nevertheless exists between them, a wholly different type of principle is likely to be operating. Jung called this principle “synchronicity.”
Jung believed that the phenomenon of synchronicity was primarily connected with psychic conditions, he felt that such couplings of inner (subjective) and outer (objective) reality evolved patterns inherent in the human psyche and shared by all of mankind.
Implicit in Jung’s concept of synchronicity is the belief in the ultimate “oneness” of the universe. As Jung expressed it, such phenomenon betrays a “peculiar interdependence of objective elements among themselves as well as with the subjective (psychic) states of the observer or observers.” Jung claimed to have found evidence of this interdependence, not only in his psychiatric studies, but in his research of esoteric practices as well.http://www.tricos.org/library/mws_3.html
syn·chro·nous Late Latin synchronos, from Greek, from syn- + chronos time Date: 1669 1 : happening, existing, or arising at precisely the same time
2 : recurring or operating at exactly the same periods 3 : involving or indicating synchronism 4 a : having the same period; also : having the same period and phase b : GEOSTATIONARY 5 : of, used in, or being digital communication (as between computers) in which a common timing signal is established that dictates when individual bits can be transmitted, in which characters are not individually delimited, and which allows for very high rates of data transfer
co·in·ci·dence Date: 1605 1 : the act or condition of coinciding : CORRESPONDENCE 2 : the occurrence of events that happen at the same time by accident but seem to have some connection; also : any of these occurrences