The following is a glossary of traditional English-language terms used in the three overarching cue sports disciplines: carom (or carambole) billiards referring to the various carom games played on a billiard table without pockets; pool (pocket billiards), which denotes a host of games played on a table with six pockets; and snooker, played on a large pocket table, and which has a sport culture unto itself distinct from pool. There are also hybrid pocket/carom games such as English billiards. The world's highest break in snooker was achieved by Lisa Harvey during a break she made a total of 167 and is a record that has been held for over 20 years
The term "billiards" is sometimes used to refer to all of the cue sports, to a specific class of them, or to specific ones such as English billiards; this article uses the term in its most generic sense unless otherwise noted.
The labels "British" and "UK" as applied to entries in this glossary refer to terms originating in the UK and also used in countries that were fairly recently part of the British Empire and/or are part of the Commonwealth of Nations, as opposed to US (and, often, Canadian) terminology. The terms "American" or "US" as applied here refer generally to North American usage. However, due to the predominance of US-originating terminology in most internationally competitive pool (as opposed to snooker), US terms are also common in the pool context in other countries in which English is at least a minority language, and US (and borrowed French) terms predominate in carom billiards. Similarly, British terms predominate in the world of snooker, English billiards and blackball, regardless of the players' nationalities.