volatile
Americanadjective
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evaporating rapidly; passing off readily in the form of vapor.
Acetone is a volatile solvent.
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tending or threatening to break out into open violence; explosive.
a volatile political situation.
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changeable; mercurial; flighty.
a volatile disposition.
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(of prices, values, etc.) tending to fluctuate sharply and regularly.
volatile market conditions.
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fleeting; transient.
volatile beauty.
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Computers. of or relating to storage that does not retain data when electrical power is turned off or fails.
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able to fly or flying.
noun
adjective
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(of a substance) capable of readily changing from a solid or liquid form to a vapour; having a high vapour pressure and a low boiling point
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(of persons) disposed to caprice or inconstancy; fickle; mercurial
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(of circumstances) liable to sudden, unpredictable, or explosive change
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lasting only a short time
volatile business interests
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computing (of a memory) not retaining stored information when the power supply is cut off
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obsolete flying or capable of flight; volant
noun
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a volatile substance
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rare a winged creature
Other Word Forms
Derived Forms
Etymology
Origin of volatile
First recorded in 1250–1300; Middle English, from Latin volātilis, equivalent to volāt(us) “flown,” past participle of volāre “to fly” + -ilis -ile
Explanation
Watch out when a situation becomes volatile — it is likely to change for the worse suddenly. If you and your best friend have a volatile relationship, you frequently fight and make up. Volatile from Latin volatilis, "fleeting, transitory," always gives the sense of sudden, radical change. Think of it as the opposite of stable. A person who is volatile loses his or her temper suddenly and violently. A volatile political situation could erupt into civil war. When the stock market is volatile, it fluctuates greatly. And in scientific language, a volatile oil evaporates quickly.
Vocabulary lists containing volatile
Words from "The Avengers"
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A Thousand Splendid Suns
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This Week in Words: November 11 - 17, 2017
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Methane is an extremely volatile substance that can quickly change from solid ice to gas.
From Science Daily • Jun. 4, 2026
During boom times, on the other hand, investors tend to overpay for volatile stocks by assuming continued gaudy returns.
From The Wall Street Journal • Jun. 3, 2026
In my head there was disbelief, and my emotions were volatile – one moment in tears, the next elated because it was going to allow me to go about my daily routine.
From BBC • Jun. 3, 2026
My colleague, Al Root, says it’s likely the space sector will be volatile heading into the SpaceX IPO as new investors enter the sector.
From Barron's • Jun. 2, 2026
Mitchell thinks his father and Kathie were a volatile mix and that his dad might’ve been different with Michael and Terryl before the parents split.
From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
