unpredictable

adjective

un·​pre·​dict·​able ˌən-pri-ˈdik-tə-bəl How to pronounce unpredictable (audio)
: not predictable: such as
a
: not able to be known or declared in advance
unpredictable weather
b
: tending to behave in ways that cannot be predicted
an unpredictable boss
unpredictably adverb
changes that occur unpredictably
unpredictability noun
the unpredictability of the weather

Examples of unpredictable in a Sentence

unpredictable spring weather that makes it really hard to know what to wear
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
But a live show — especially an outdoor one— is sometimes subject to unpredictable circumstances. Mackenzie Schmidt, PEOPLE, 26 Sep. 2025 Ross Intermediate School in Butler County will close due to declining enrollment and unpredictable state funding. Grace Tucker, Cincinnati Enquirer, 26 Sep. 2025 Unlike a political event where attendance can be limited to supporters or tightly controlled to make sure that obvious dissent is at a minimum, sporting events are wild and unpredictable environments. Kyle Feldscher, CNN Money, 26 Sep. 2025 Dirty kicks are essentially high-arching knuckleballs that can land in the middle of the field and take an unpredictable bounce or fly at an angle, depending on how the kicker makes contact. Andrew Callahan, Boston Herald, 26 Sep. 2025 See All Example Sentences for unpredictable

Word History

First Known Use

1840, in the meaning defined above

Time Traveler
The first known use of unpredictable was in 1840

Browse Nearby Words

Cite this Entry

“Unpredictable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unpredictable. Accessed 4 Oct. 2025.

Kids Definition

unpredictable

adjective
un·​pre·​dict·​able
ˌən-pri-ˈdik-tə-bəl
: not predictable
unpredictability
-ˌdik-tə-ˈbil-ət-ē
noun
unpredictably
-ˈdik-tə-blē
adverb

More from Merriam-Webster on unpredictable

Last Updated: - Updated example sentences
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