Volatileとは 意味・読み方・使い方

語源

From Middle French volatile, from Latin volātilis (“flying; swift; temporary; volatile”), from volō (“I fly”).

発音

• (英国発音) IPA: /ˈvɒl.əˌtaɪ.(ə)l/
• (米国発音) IPA: /ˈvɑ.lə.təl/, [ˈvɑ.lə.tl̩], [ˈvɑ.lə.ɾɫ̩]

形容詞

volatile (comparative more volatile, superlative most volatile)

1. (physics) Evaporating or vaporizing readily under normal conditions.
2. (informal) Of a substance, explosive.
3. (economics, finance) Of a price, variable or erratic.
   • 2024 November 19, Jeanne Sahadi, “Bitcoin has smashed records. Should you invest?”, in CNN Business‎:

     Its pricing is highly volatile — and therefore highly risky. For all its nosebleed ascents, bitcoin also has had some gut-punching plunges. Between November 2021 and November 2022, for example, the price of bitcoin dropped 75%, from $64,455 to $16,196, according to data on coinmarketcap.com.

4. Of a person, quick to become angry or violent.

   a volatile man

5. Fickle.
6. Temporary or ephemeral.
7. Of a situation potentially violent.
8. (programming) Of a variable etc., having its associated memory immediately updated with any changes in value.
   • 2010, Jon Jagger, Nigel Perry, Peter Sestoft, Annotated C# Standard, page 467:

     This method stores a value into a non-volatile field called result, then stores true in the volatile field finished. The main thread waits for the field finished to be set to true, then reads the field result.

9. (computing) Of memory, whose content is lost when the computer is powered down.
10. (obsolete) Passing through the air on wings, or by the buoyant force of the atmosphere; flying; having the power to fly.

(Can we add an example for this sense? )

同意語

• See also Thesaurus:ephemeral

派生語

名詞

volatile (plural volatiles)

1. A chemical or compound that changes into a gas easily.
2. (programming) A variable that is volatile, i.e. has its associated memory immediately updated with any change in value.
   • 2011, Victor Pankratius, Ali-Reza Adl-Tabatabai, Walter Tichy, Fundamentals of Multicore Software Development, page 74:

     Operations on C++ volatiles do put the compiler on notice that the object may be modified asynchronously, and hence are generally safer to use than ordinary variable accesses.

形容詞

volātile

1. nominative/accusative/vocative neuter singular of volātilis

参照

• "volatile", in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)