Standard Lemma guide

fugacity

noun · 5 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • /fjuːˈɡæsɪti/

1

noun

Meaning 1

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

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A measure of the relative stability of different phases of a substance under the same conditions.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: natural-sciences, physical-sciences, physics

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

Transience.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

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

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: fugaciousness

Antonyms: none provided

Broader terms: transience, transiency, transitoriness

5

noun

Meaning 5

the tendency of a gas to expand or escape

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: physical property

History

Etymology

From Latin fugiō (“flee”) + -acity.

Across languages

Translations

15 source translations are retained for this English entry.

  • Bulgarian: летливост (letlivost) — measure of the tendency of a fluid to expand or escape
  • Old Czech: běžnost — measure of the tendency of a fluid to expand or escape
  • Dutch: fugaciteit — measure of the tendency of a fluid to expand or escape
  • Italian: fugacità — measure of the tendency of a fluid to expand or escape
  • Polish: lotność — measure of the tendency of a fluid to expand or escape
  • Polish: fugatywność — measure of the tendency of a fluid to expand or escape
  • Irish: éalaitheacht — measure of the relative stability of different phases of a substance under the same conditions
  • Italian: fugacità — measure of the relative stability of different phases of a substance under the same conditions
  • Polish: lotność — measure of the relative stability of different phases of a substance under the same conditions
  • Polish: fugatywność — measure of the relative stability of different phases of a substance under the same conditions
  • Bulgarian: мимолетност (mimoletnost) — transience
  • Bulgarian: краткотрайност (kratkotrajnost) — transience
  • Polish: przejściowość — transience
  • Polish: tymczasowość — transience
  • Polish: efemeryczność — transience