Definitions

1. noun

the occurrence of two or more events at the same time by chance, rather than as a result of a causal relationship.

“It was a coincidence that they met at the airport on their way to the same destination.”

2. noun

an event or situation that happens at the same time as another event or situation, and is therefore unlikely to be related to it.

“The discovery of the two ancient cities was a coincidence, as they were separated by a vast distance.”