Pronunciation: (fôr'sum, fōr'-), [key]
1. a company or set of four; two couples; a quartet: to make up a foursome for bridge.
a. a match between two pairs of players, each of whom plays his or her own ball.
b. Also called Scotch foursome. a match between two pairs of players, in which each pair plays one ball and partners stroke alternately.
consisting of four persons, things, etc.; performed by or requiring four persons.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.