Synchronicity is a concept introduced by psychologist Carl Jung that describes meaningful coincidences that occur with no apparent causal connection. It suggests that events can be related through their meaning rather than through direct cause and effect. For example, thinking about an old friend and then unexpectedly encountering them can be seen as a synchronistic event. This idea emphasizes the interconnectedness of experiences and the universe, suggesting that our thoughts and feelings can align with external events. Synchronicity is often explored in psychology, spirituality, and philosophy, as it raises questions about fate, intuition, and the nature of reality.