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Adjective: random  ran-dum
  1. Lacking any definite plan or order or purpose; governed by or depending on chance
    "a random choice"; "bombs fell at random"; "random movements"
  2. Representative and undistinguished; typical and average
    "A random American off the street couldn't tell the difference"
  3. (statistics) given by a probability distribution rather than being deterministic

See also: ergodic, haphazard, hit-or-miss, stochastic

Antonym: nonrandom

Encyclopedia: Random