The meaning of UNPREDICTABLE is not predictable. How to use unpredictable in a sentence. When something's unpredictable, it doesn't happen at expected times or it can't be predicted.

Understanding the Context

If trains were unpredictable, they wouldn't follow a set schedule and you'd never know when one would arrive. UNPREDICTABLE definition: 1. likely to change suddenly and without reason and therefore not able to be predicted (= expected…. Learn more.

Key Insights

If you describe someone or something as unpredictable, you mean that you cannot tell what they are going to do or how they are going to behave. He is utterly unpredictable. ...Britain's notoriously unpredictable weather. Define unpredictable. unpredictable synonyms, unpredictable pronunciation, unpredictable translation, English dictionary definition of unpredictable.

Final Thoughts

adj. Difficult to foretell or foresee: unpredictable test results; unpredictable behavior. Adjective unpredictable (comparative more unpredictable, superlative most unpredictable) Unable to be predicted. Synonyms: (far less common) nonpredictable, vagabond Antonym: predictable not to be foreseen or foretold: an unpredictable occurrence. n. something that is unpredictable: the unpredictables of life.

un′pre dict′a bil′i ty, un′pre dict′a ble ness, n. 1. . erratic, fitful, variable, uncertain.