instability

noun

in·​sta·​bil·​i·​ty ˌin(t)-stə-ˈbi-lə-tē How to pronounce instability (audio)
: the quality or state of being unstable
especially : lack of emotional or mental stability

Examples of instability in a Sentence

Investors are worried about the current instability of the stock market. The patient has a history of emotional instability.
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.
At that stage, the precision was still limited by the instability of the laser. Aamir Khollam, Interesting Engineering, 9 Oct. 2025 The initiative also began a pilot rental assistance program over the summer for households at risk of eviction or instability. Desiree Mathurin, Charlotte Observer, 9 Oct. 2025 His childhood moved fast—13 schools in 11 years, ricocheting across state lines and shaped by instability at home. Jp Mangalindan, Time, 9 Oct. 2025 Harwicz’s novels are more hallucinatory than supernatural—but a more provocative distinction between her books and others in this semi-subgenre is that, for her characters, motherhood does not cause animal rage and instability so much as instantiate them. Jessica Winter, New Yorker, 8 Oct. 2025 See All Example Sentences for instability

Word History

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of instability was in the 15th century

Browse Nearby Words

Cite this Entry

“Instability.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/instability. Accessed 17 Oct. 2025.

Kids Definition

instability

noun
in·​sta·​bil·​i·​ty ˌin(t)-stə-ˈbil-ət-ē How to pronounce instability (audio)
: the quality or state of being unstable

Medical Definition

instability

noun
in·​sta·​bil·​i·​ty ˌin(t)-stə-ˈbil-ət-ē How to pronounce instability (audio)
plural instabilities
: the quality or state of being unstable
especially : lack of emotional or mental stability

More from Merriam-Webster on instability

Last Updated: - Updated example sentences
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