A family reunion is an occasion when many members of an extended family congregate. Sometimes reunions are held regularly, for example on the same date of every year. Some for very special occasions.
A typical family reunion will assemble grandparents, great-grandparents and up for a meal, some recreation and discussion. The older attendees are generally grandparents, parents, siblings or first cousins while the youngest could be second, third or fourth cousins.
It is also not uncommon for regular family reunions to be sponsored by family organizations or family associations centered on a more distant common ancestor (often referred to as "ancestral family organizations") or a commonly shared surname ("single surname family organizations").