Occasions when people who have been separated come back together, or plural form referring to multiple such gatherings.
From re- (again) + union (from Latin 'unio' meaning oneness). The word appeared in the 16th century meaning 'joining again.'
School reunions became a cultural phenomenon mainly because of automobiles—before cars, most people never left their hometown, so reunions were pointless; now they're major social events that happened to become a marketing goldmine!
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