What a coincidence!
A "coincidence" is when something that seems unlikely happens. Here are some examples of coincidences:
- You're vacationing in another country, and you run into one of your friends from college who's on a vacation there as well.
- You check your account balance at an ATM, and the amount of money in your account is exactly equal to the year that you were born.
- Three movies come out in the same season which are all based on the same children's story.
When something coincidental happens, you can say:
What a coinclidence!