1. In eight-ball , when all object balls are balls-on for either player. See open table .
2. A description of a break shot in which the rack (pack) is spread apart well. See also the open break requirement in some games' rules, including eight-ball and nine-ball
3. In carom billiards , descriptive of play in which the balls are not gathered. See open play .
4. A description of a layout of balls in a pocket billiards game (of almost any kind) that, because it is so spread out , makes its easy for a good player to run out and win, due to lack of problematic clustered and frozen balls.