Billiard or billiards may refer to:


  • A billiard, a type of shot in cue sports (see below)
  • Billiards: cue sports in general; the term "billiards" by itself is also sometimes used to refer to any of the following more specifically:
    • Carom billiards (also known as French billiards), games in general (a chiefly non-British usage)
    • Three-cushion billiards, even more specifically, the most popular form of carom billiards worldwide
    • The specific game of English billiards (a chiefly British, Irish and Australian usage)
    • Pool (cue sports) (pocket billiards) games, such as eight-ball and nine-ball, in general (a chiefly colloquial North American usage)
  • See the list of cue sports for various other games with "billiards" in their names; also more specifically:
    • Pin billiards, a fairly large number of billiard games that use a pin, or a set of pins or "skittles"
    • Bar billiards, a game combining elements of bagatelle and English billiards
  • Electric billiards, an obsolete term for pinball (from billard électrique in French, in which pinball is today called flipper, a borrowing from English)

Mathematics and physics

  • Billiard (number), the long-scale name used in most European languages for the number 1015 (called quadrillion in the short scale generally used in English)
  • Dynamical billiards, the mathematical theory of particle trajectories within a closed reflective boundary



See also