Definition of Under the break

Extreme application of draw. This when the draw back of the cue ball is your first priority, and you apply extra draw to the hit of the cue ball.

This is a special shaped leather or plastic bottle that is used on the table during play in special pocket games.

The ball required to guarantee victory in a match. Sometimes used figuratively to mean the last difficult ball required (chiefly British and usually used in multi-frame matches, particularly snooker).

A rare and extremely difficult trick jump shot that turns into a massé upon landing. Requires very precise application of spin in addition to the precise application of ball pressure to effectuate the jump. Turn-of-the-20th-century World Balkline Champion Jacob Schaefer Sr. was known to daringly perform jump massés in competition.

A low hit on the cue ball (but not as low as normal draw), often used to change the cue ball's angle of deflection off the object ball.

A highly skilled hustler making money gambling while traveling. Fast Eddie Felson in The Hustler was a road player. One of the most notorious real-life road players is Keith McCready.

Certain rules say you must designate your shot before taking it. Generally this is just calling the ball to be sunk in which pocket, and is not dependent on touching rails or other balls, but very well can be.

Also (chiefly British) programme. Short for shot program. The enumerated trick shots that must be performed in the fields of artistic billiards (70 pre-determined shots) and artistic pool (56 tricks in 8 "disciplines").

Chiefly American: The cushion on the foot rail. Compare top cushion; contrast head cushion.

Also bar box, pub table, tavern table. Distinctive pool tables found in bars/pubs/taverns, and often in various other venues such as family entertainment centers and arcade rooms at bowling alleys. They are almost always coin-operated and smaller than tables found in pool halls. Typical bar boxes are 3.5 ft (1.1 m) × 7 ft (2.1 m).

The Equalizer Handicap System is the handicap system developed by the American Poolplayers Association. It makes it feasible for a beginner to have a nearly equal chance in a match against a more highly skilled player.

Describing a pot played at such a pace as to just reach the pocket and drop in without hitting the back.

To give a handicap to an opponent where they have to win a specified number less games than the other player in order to triumph in the match. The name refers to posting games on the scorekeeping mechanism known as a wire, though it is employed when no actual use of the particular device is available or intended.

This is playing to a higher winning score than eight in the game of one pocket.

When the cue ball is tucked behind the corner of a pocket or behind other object balls against a rail, therefore not allowing a direct shot at the object ball without the cue bouncing off the corner of the rail.
A term also used to mean when the object ball you must hit next is hidden behind other balls against a rail and you are not able to get a clean hit (without hitting other object balls first) on it. e.g. "You hooked me".

A multi-game division of a match, as used in some league and tournament formats. For example, in a match between 2 teams of 5 players each, a 25-game match might be divided into 5 rounds of 5 games each, in which the roster of one team moves one line down at the beginning of each round, such that by the end of the match every player on team A has played every player on team B in round robin fashion.
A level of competition elimination in a tournament, such as the quarterfinal round, semifinal round and final round.

A players skill level, ball advantage or match advantage when using a handicapping system.

This describes a shot where you bank the object ball off of a rail and then sink it in a side pocket.

This is a game played with the same balls and similar scoring methods of carom, but with pockets on the table, and more scoring opportunities awarded when certain balls are sunk in combination.

This is to have control on the cue ball in your shots.

This describes a shot where you bank the object ball off of a rail and then sink it in a corner pocket.

Actual wire or string with multiple beads strung (like an abacus) used for keeping score. Points "on the wire" are a type of handicap used, where a weaker player will be given a certain number of points before the start of the game.

The way in which a player holds the butt end of the cue stick.
The wrap of the cuestick where the hand is placed, also known as the "grip area."

This is a series of angled rails present within some pool tables that directs pocketed balls to a central location on the table for retrieval after the game.