1. Play, from the opening break shot until one player has won (or the game has been halted for some reason by a referee ). Games are the units that make up matches, races (in some senses of that term) and rounds. Essentially the same as frame , except with regards to straight pool , which is a multi- rack game .
2. An identifiable, codifiable set of rules. pool is not a game , but a class of games. Nine-ball is a game .
3. Note: There are also slang usages, such as "to have game " (to be a good player, as in "he['s] got game ") and "to be game " (to be willing to play or to gamble, as in "yeah, I'm game , so let's see what you've got"). But these usages are not particular to cue sports.