instability

noun

in·​sta·​bil·​i·​ty ˌin(t)-stə-ˈbi-lə-tē 

: the quality or state of being unstable

especially : lack of emotional or mental stability

Synonyms

• insecurity
• precariousness
• shakiness
• unstableness
• unsteadiness

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

His ouster, along with the accompanying instability and popular discontent that lingered after him, helped pave the way for Ansar Allah's advances, ultimately seizing the capital in 2015. —Thomas G. Moukawsher, Newsweek, 21 Mar. 2025

This can have serious financial consequences, such as losing a home or car, which can further exacerbate financial instability. —True Tamplin, Forbes, 20 Mar. 2025

Supporting the development of housing that pairs units with on-site services addressing the root causes of homelessness, including mental health challenges, substance use disorders, and economic instability. —Courier-News, Chicago Tribune, 20 Mar. 2025

The company acknowledges the impact of macroeconomic trends and geopolitical instability on its operations and financial performance. —Quartz Intelligence Newsroom, Quartz, 19 Mar. 2025

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for instability

• affability
• audibility
• bistability
• capability
• changeability
• contractility
• credibility
• culpability
• disability
• disutility
• durability
• fallibility

Kids Definition

instability

noun

in·​sta·​bil·​i·​ty ˌin(t)-stə-ˈbil-ət-ē 

: the quality or state of being unstable

Medical Definition

instability

noun

in·​sta·​bil·​i·​ty ˌin(t)-stə-ˈbil-ət-ē 

plural instabilities

: the quality or state of being unstable

especially : lack of emotional or mental stability