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Noun: variability  ,veh-ree-u'bi-lu-tee
  1. The quality or degree of being subject to variation
    - variableness, variance
  2. The quality of being uneven and lacking uniformity
    - unevenness

Derived forms: variabilities

Type of: changeability, changeableness, irregularity, unregularity

Antonym: invariability

Encyclopedia: Variability