Definitions for "Four-Ball"
a match in which two 2-person teams compete against each other using the one best score from each side (commonly and mistakenly referred to as "Best-Ball," which is actually one player competing against the better ball of two or three other players).
A match in which 2 plays their better ball against the better ball of 2 other players.
A competition played in pairs, where the best score counts against the best score of the opponents.