noun: (gaming, informal) Randomness, variability, or luck produced by a random number generator.
noun: (algebra) An algebraic structure satisfying the same properties as a ring, except that multiplication need not have an identity element.
noun: Initialism of random number generator. [A device or algorithm that generates numbers at random or apparently at random. In many cases they actually select successive numbers deterministically and are more technically termed pseudorandom number generator.]
noun: (roguelikes, humorous) Initialism of Random Number God. [(roguelikes, humorous) The pseudorandom number generator used by a roguelike game's engine.]