foursome

Definitions

• A group of four people engaged in a common activity.
  A quartet in harmony, moving as one, bound by purpose and camaraderie.
  Example: They play golf as a foursome every weekend.
• A set of four players or teams competing against each other.
  A lively quartet of rivals, dancing in a spirited contest upon the fields of endeavor.
  Example: The tournament was set up in sets of foursomes.