Synchronicity is the experience of two or more events as meaningfully related, where they are unlikely to be causally related. The subject sees it as a meaningful coincidence. The concept of synchronicity was first described by Carl Jung, a Swiss psychologist, in the 1920s.
The concept does not question, or compete with, the notion of causality (however critics state that the causality, statistics and probability theorems, is enough for explaining cases of “synchronicity”, which are in fact “normal events of low probability”). It maintains that just as events may be connected by a causal line, they may also be connected by meaning. A grouping of events by meaning need not have an explanation in terms of a concrete sense of cause and effect.
definition: 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 Carl Jung.