Eight-ball in the context of "Blackball (pool)"

Pool is a series of cue sports played on a billiard table. The table has six pockets along the rails, into which balls are shot. Of the many different pool games, the most popular include: eight-ball, blackball, nine-ball, ten-ball, seven-ball, straight pool, one-pocket, and bank pool. Eight-ball is the most frequently played discipline of pool, and it is often thought of as synonymous with "pool".

The generic term pocket billiards is sometimes also used, and favored by some pool-industry bodies, but is technically a broader classification, including games such as snooker, Russian pyramid, and kaisa, which are not referred to as pool games. There are also hybrid games combining aspects of both pool and carom billiards, such as American four-ball billiards, bottle pool, cowboy pool, and English billiards.

Straight pool, which is also called 14.1 continuous and 14.1 rack, is a cue sport in which two competing players attempt to pocket as many object balls as possible without playing a foul. The game was the primary version of pool played in professional competition until it was superseded by faster-playing games like nine-ball and eight-ball in the 1980s.

In straight pool, the player may call and attempt to pocket any object ball on the table regardless of its number or color until only one object ball and the cue ball remain, at which point the other fourteen balls are re-racked. At this point, play resumes with the objective of pocketing the remaining ball in a manner that causes the cue ball to carom into the rack, spreading out the balls and allowing the player to continue the run. The goal is to reach a set number of points that is determined by agreement before the game begins; traditionally 100 points is needed for a win, though professional matches may go higher. One point is scored by pocketing an object ball without a foul, while a point is deducted on a foul.