This is the 10769th most frequent Russian word.
встретятся
"To meet" or "to encounter" (plural or future tense).
In this sentence, 'встретятся' is used in its direct meaning to denote that two or more people will meet or encounter each other at a specific event.
Они встретятся завтра на свадьбе.
They will meet tomorrow at the wedding.
Here, 'встретятся' illustrates the concept of crossing paths or coming into contact in the context of expressing a wish for this not to occur.
Надеюсь, они никогда больше не встретятся.
I hope they will never meet again.
In this case, 'встретятся' conveys the idea of a reunion after a period of absence.