This refers to when two or more people encounter each other in completely coincidental fashion. You might notice your old classmate from three countries away is now your waiter in a place you had no reason to expect them in, and you might say “wow, what a small world”. You might notice two people who you know from completely different spheres miraculously know each other. You might recognize by chance that your penpal has made a cameo at a venue you’re at.
But what was your most profoundly coincidental encounter?
My parents emigrated separately in the 1950s from a large city in Europe to Australia.
There were 3 ways my parents could have met each other, but they didn’t meet until they moved to the other side of the world, when they discovered that they had so much in common.