Try Our Apps


The Best Internet Slang


[fyoo-gey-shuh s] /fyuˈgeɪ ʃəs/
fleeting; transitory:
a sensational story with but a fugacious claim on the public's attention.
Botany. falling or fading early.
Origin of fugacious
1625-35; < Latin fugāci- (stem of fugāx apt to flee, fleet, derivative of fugere to flee + -ous
Related forms
fugaciously, adverb
fugaciousness, fugacity
[fyoo-gas-i-tee] /fyuˈgæs ɪ ti/ (Show IPA),
noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
Examples from the Web for fugacity
Historical Examples
  • The best of pigments may be ruined by their injudicious use, and obtain a character for fugacity which they in no way deserve.

    Field's Chromatography George Field
  • It is so serviceable a pigment for so many purposes, especially in admixture, that its sin of fugacity is overlooked.

    Field's Chromatography George Field
  • There is no need for this cant cry of fugacity, which casts such a blight on modern art.

    Field's Chromatography George Field
  • As there are different degrees both of permanence and fugacity, so are there different degrees of semi-stability.

    Field's Chromatography George Field
  • Will they not rather spread over the picture the Upas-tree of fugacity, and kill it as they die themselves!

    Field's Chromatography George Field
British Dictionary definitions for fugacity


(thermodynamics) Also called escaping tendency. a property of a gas, related to its partial pressure, that expresses its tendency to escape or expand, given by d(logef) = dμ/RT, where μ is the chemical potential, R the gas constant, and T the thermodynamic temperature f
the state or quality of being fugacious


passing quickly away; transitory; fleeting
(botany) lasting for only a short time: fugacious petals
Derived Forms
fugaciously, adverb
fugaciousness, noun
Word Origin
C17: from Latin fugax inclined to flee, swift, from fugere to flee; see fugitive
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for fugacity



"fleeing, likely to flee," 1630s, from Latin fugaci-, stem of fugax "apt to flee, timid," figuratively "transitory, fleeting," from fugere "to flee" (see fugitive) + -ous. Related: Fugaciously; fugaciousness.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
fugacity in Medicine

fugacity fu·gac·i·ty (fyōō-gās'ĭ-tē)
A measure of the tendency of a substance, often a fluid, to move from one phase to another or from one site to another.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source

Word of the Day

Difficulty index for fugacious

Few English speakers likely know this word

Word Value for fugacity

Scrabble Words With Friends

Nearby words for fugacity