re‧u‧nion /riːˈjuːnjən/ noun

1. [countable] a social meeting of people who have not met for a long time, especially people who were at school or college together:
an annual reunion
a family reunion
a high-school reunion

2. [uncountable] when people are brought together again after a period of being separated
reunion with
Joseph’s eventual reunion with his brother

[TahlilGaran] Dictionary of Contemporary English ▲

Réunion
an island in the western Indian Ocean east of Madagascar, that is a dependency of France. Population: 798,094 (2007). Capital: Saint-Denis.

[TahlilGaran] Dictionary of Contemporary English ▲

reunion
noun
ADJ. emotional, tearful | class, college, school, university | family | annual | grand
VERB + REUNION have, hold, plan The reunion is held every two years.
arrange, organize | attend, go to | celebrate Let's have a party to celebrate our reunion.
REUNION + VERB take place
REUNION + NOUN dinner, lunch
PREP. at a/the ~ At the reunion I met a friend I hadn't seen for twenty years.
~ between an emotional reunion between mother and son
~ for organizing a reunion for former company employees
~ with a tearful reunion with his family

[TahlilGaran] Collocations Dictionary ▲