Definition of cover

This is a particular ball which lends itself to be used as a "blocker" or a "protector."
To use a particular ball as security by playing a safety or leaving it where it will act as one.

24 Random Essential Billiards Terms

This a shot that hits the object ball at the nine ball to see if you can get lucky by sinking the nine ball in any pocket. (also see Cheese the Nine and Rolling the Cheese).
When the cue ball is tucked behind the corner of a pocket, therefore not allowing a direct shot at the object ball without it bouncing of the corner of the rail.
This is to intentionally foul by slightly moving the ball, or playing another type of illegally defensive shot in a game where the ball is just turned over to the other player. Like in one pocket, you still take the foul, but can leave the other player with a challenging shot.
Describing a ball that is safe because it is in close proximity to one or more other balls, and would need to be developed before it becomes pottable.
A common aiming method in which a phantom ball is imagined frozen to the object ball at the point where an imaginary line drawn between their centers is aimed at the desired target; the cue ball may then be shot at the center of the "ghost" ball and, ideally, impact the object ball at the proper aiming contact point. The ghost ball method of aiming results in misses where adjustment is not made for collision induced throw.
This is a type of shot where the cue ball goes off the rail before it heads to contact the object ball, thus giving the cue better position in some shots.
A fast paced offensive game similar to 9-ball but only using balls numbered 1 through 7.
Pocketing the 7-ball wins the game. Under the current pro rules of 7-ball, any missed shot gives your opponent ball-in-hand.
A shot aimed so that the center of the cue ball is in line with the edge of the object ball, eclipsing half of the ball. "Hit it just a little thinner than half-ball." Assuming a cling does not occur, the shot will impart post-contact momentum on the object ball in a direction 30° (which is arcsin(1 - x), where x is the fraction of object ball eclipsed: ½ in this case) off the direction of the cue-ball's pre-contact momentum. Also notable because the carom angle the cue ball takes is more consistent than at other contact points.
The deciding match between two tied opponents. Compare hill, hill.
A player's turn at the table, also known as an inning.
In the eight-ball game variant blackball, also known as eight-ball pool, a differently colored but otherwise identical replacement for the red group (i.e., what would be the solids in an American-style pool ball set).
The United States Snooker Association (USSA) is the internationally recognized governing body of the sport of snooker in the United States. Founded in 1991 by the British-born Michael Collins, the USSA is a member of the International Billiards and Snooker Federation (IBSF), the world governing body of non-professional English billiards and snooker, and is affiliated with the American CueSports Alliance (ACS).
Principally British: In snooker, if a player wins all of the required frames in a match without conceding a frame to their opponent - for example, if a player wins a best-of-nine-frame match with a score of 5-0 - this is referred to as a "whitewash". This term is based on a similar term used in the card game of "patience" in the UK. However, it is not used in the context of a 1-0 winning scoreline in a match consisting of a single frame.
This is a type of shot that is executed by an object ball caroming off of another object ball in order to gain the pocket.
This is a bank in one pocket pool that is sitting at an angle that makes it unsafe to play.
A player's (or doubles team's) turn at the table, usually ending with a failure to score a point or to pocket a ball, depending on the game, a foul, a safety or with a win. In some games, such as five-pins and killer, a player's inning is always limited to one shot, regardless of the intent and result of the shot. Usually synonymous with visit, except in scotch doubles format. The term is sometimes used to mean both players'/teams' visits combined, e.g. when referring to which inning in which a memorable shot occurred.
This is a shot that attempts to move a number of balls onto your side of the table in a kind of herding attempt.
Refers to a person gambling when he has no money. As in, "That jerk can't pay up, he was shooting air barrels the whole time".
The upper portion of a cue which slides on a player's bridge hand and upon which the tip of the cue is mounted at its terminus. It also applies to the main, unsegmented body of a mechanical bridge.
Also piquet. Either a massé shot with no english, or a shot in which the cue stick is steeply angled, but not held quite as vertical as it is in full massé.
Jargon for a tournament chart, showing which players are playing against whom and what the results are. Often shortened to card.
An intentionally amateurish stroke to disguise one's ability to play.
The precise center of the pool table.
The pocket in snooker that is closest to the green spot.