fugacity

F4U1G2A1C3I1T1Y4
/fjuːˈɡæsɪti/

noun

A measure of the tendency of a fluid to expand or escape.

Similar
ephemeralityimpermanencetransiencyfugaciousness
OriginLatin fugiō →
UncommonScrabble 17
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Meanings

nounfugacity (countable and uncountable, plural fugacities)

plural fugacities

  1. countableuncountableA measure of the tendency of a fluid to expand or escape.
  2. countableuncountablenatural sciencesA measure of the relative stability of different phases of a substance under the same conditions.
  3. countableuncountableTransience.

    Duke Orbal disallowed it on the grounds of fugacity.

    1983, Jack Vance, Cugel's Saga

    Synonyms: ephemerality

Synonyms & antonyms

nounTransience.

Similar
ephemerality
Similar
impermanencetransiency

More synonyms by meaning

nounthe lack of enduring qualities (used chiefly of plant parts)

Similar
fugaciousness
Broader
transiencetransiencytransitoriness
Also see
fugaciousnessimpermanencetemporarinesstransiencetransientness

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Latinfugiō“flee”
  2. Englishfugacity

From Latin fugiō (“flee”) + -acity.

More words from Latin

Full word history & related roots →

Translations

Bulgarian летливост, мимолетност
  • летливост (letlivost)measure of the tendency of a fluid to expand or escape
  • мимолетност (mimoletnost)transience
  • краткотрайност (kratkotrajnost)transience
Dutch fugaciteit
  • fugaciteitmeasure of the tendency of a fluid to expand or escape
Irish éalaitheacht
  • éalaitheachtmeasure of the relative stability of different phases of a substance under the same conditions
Italian fugacità, fugacità
  • fugacitàmeasure of the tendency of a fluid to expand or escape
  • fugacitàmeasure of the relative stability of different phases of a substance under the same conditions
Polish lotność, fugatywność
  • lotnośćmeasure of the tendency of a fluid to expand or escape
  • fugatywnośćmeasure of the tendency of a fluid to expand or escape
  • lotnośćmeasure of the relative stability of different phases of a substance under the same conditions
  • fugatywnośćmeasure of the relative stability of different phases of a substance under the same conditions
  • przejściowośćtransience
  • tymczasowośćtransience
  • efemerycznośćtransience
Cite this entry
APA

fugacity. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/fugacity

MLA

“fugacity.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/fugacity. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “fugacity,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/fugacity.

Source: fugacity on Wiktionary, CC BY-SA 4.0.