Definition of Unpredictable

not able to be predicted, foreseen, or anticipated

Examples of Unpredictable in a sentence

The unpredictable weather see-sawed from scorching hot one day to freezing cold the next.  🔊

Because the lottery numbers are unpredictable, there is know what to know which numbers will be drawn.  🔊

Brenda’s mood was unpredictable, so no one at the office knew if she would come in laughing or raging.  🔊

Other words in the Mysterious & Unknown category:

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