| Noun | 1. | unpredictability - the quality of being guided by sudden unpredictable impulseschangefulness, inconstancy - the quality of being changeable and variable |
| 2. | unpredictability - the trait of being unpredictably irresolute; "the volatility of the market drove many investors away"irresoluteness, irresolution - the trait of being irresolute; lacking firmness of purpose | |
| 3. | unpredictability - lacking predictability uncertainness, uncertainty, precariousness - being unsettled or in doubt or dependent on chance; "the uncertainty of the outcome"; "the precariousness of his income" predictability - the quality of being predictable |