Thank you [emoji]

I hope that we do not have to wait too long until the 1next time. Or, .. until our 2next meeting. Or, ... 3reunion. They all mean nearly the same. 1 is very very close to 2 and would be very often heard on the street. 3 is more formal, and seldom heard in comparison. 3, unlike 1 and 2, is also used for formal events held by alumni from colleges and schools.

Thank you :-)you helped me a lot

A reunion is more official. For example, when a class graduates, they will hold official reunions at regular intervals (5 years, 10 years). Or when a sports team wins a major championship, they will have an official reunion of the players. A meeting is informal and often smaller. A friend and I will have a meeting and have lunch or I will have a meeting with my work colleagues to talk about some upcoming projects. When in doubt, use "meeting" over "reunion." I hope this helps.