This is the 272nd most frequent Spanish word.
reunión
Meeting or gathering.
Here, 'reunión' is used to describe a social gathering of relatives.
La reunión familiar será este fin de semana.
The family reunion will be this weekend.
In this context, 'reunión' signifies a planned event where former students meet.
La reunión de antiguos alumnos fue muy emotiva.
The alumni reunion was very emotional.
In this sentence, 'reunión' refers to a formal gathering of individuals for discussion.