Random

1. Having unpredictable outcomes and, in the ideal case, all outcomes equally probable; resulting from such selection; lacking statistical correlation. Synonym: aleatory
2. (mathematics) Of or relating to probability distribution. Synonym: stochastic
3. (computing) Pseudorandom; mimicking the result of random selection. Synonym: pseudorandom
4. (somewhat colloquial) Representative and undistinguished; typical and average; selected for no particular reason. Synonyms: average, typical
5. (somewhat colloquial) Apropos of nothing; lacking context; unexpected; having apparent lack of plan, cause or reason. Synonyms: arbitrary, unexpected, unplanned
6. (colloquial) Characterized by or often saying random things; habitually using non sequiturs.