un·pre·dict·able | \ˌən-pri-ˈdik-tə-bəl \

Definition of unpredictable 

: 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

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Other Words from unpredictable

unpredictably \ˌən-pri-ˈdik-tə-blē \ adverb
changes that occur unpredictably
unpredictability \ˌən-pri-ˌdik-tə-ˈbi-lə-tē \ noun
the unpredictability of the weather

Examples of unpredictable in a Sentence

Recent Examples on the Web

But the Emmys are also unpredictable and sometimes the best web series doesn't get nominated. Rebecca Farley, refinery29.com, "An Emmy For Megan," 12 July 2018 Of course, the M&A market is notoriously unpredictable and any number of factors could derail the record run. Dana Cimilluca, WSJ, "M&A Market Headed for a Record, Powered by Tech Disruption, AT&T Ruling," 1 July 2018 Drug shortages are often unpredictable and regional in nature. Katie Thomas, New York Times, "Emergency Rooms Run Out of Vital Drugs, and Patients Are Feeling It," 1 July 2018 But these sources, Richens said, are relatively unpredictable and harder to rely on than hydroelectricity. Heather Kennison, idahostatesman, "What's it like to rely on renewable energy? Look at life in Idaho.," 26 June 2018 So with the understanding that this festival is by nature unpredictable — and that there’s always money in the banana stand — here is our guide to Clusterfest 2: Bigger Than Last Year, But No Longer Colossal. Peter Hartlaub, San Francisco Chronicle, "What the Clusterfest? The Chronicle’s guide to navigating the comedy festival — banana stand included," 25 May 2018 Despite the often tight, unpredictable and dangerous conditions, 98 percent of their patients survive long enough to move on to a more advanced facility. CBS News, "Meet the Air Force's "life-saving" special operations surgical team," 25 May 2018 The local billionaires have been interested in other endeavors, and maybe that could change, but that's an unpredictable and uncontrollable thing. Sam Mellinger, kansascity, "Mellinger Minutes: Moose, Mahomes, Moore, Zenger out and the NBA in? | The Kansas City Star," 22 May 2018 Put together, the embassy move is happening at a chaotic, unpredictable and dangerous time for both the region and Israel itself. Alexia Underwood, Vox, "The controversial US Jerusalem embassy opening, explained," 14 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unpredictable.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of unpredictable

1840, in the meaning defined above

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Last Updated

11 Oct 2018

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Time Traveler for unpredictable

The first known use of unpredictable was in 1840

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More Definitions for unpredictable


un·pre·dict·able | \ˌən-pri-ˈdik-tə-bəl\

Kids Definition of unpredictable

: impossible to predict The king was a completely unpredictable tyrant.— Brian Jacques, Redwall

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Comments on unpredictable

What made you want to look up unpredictable? Please tell us where you read or heard it (including the quote, if possible).


one that holds something together

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