[las-i-tood, -tyood]


weariness of body or mind from strain, oppressive climate, etc.; lack of energy; listlessness; languor.
a condition of indolent indifference: the pleasant lassitude of the warm summer afternoon.

Origin of lassitude

1525–35; < Latin lassitūdō weariness, equivalent to lass(us) weary + -i- -i- + -tūdō -tude Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for lassitude

Contemporary Examples of lassitude

Historical Examples of lassitude

  • I seized a moment of lassitude, gave every man a trumpet, and gained the day with this handful.


    Samuel Smiles

  • But the gathering grew sad, benumbed, as it were, with lassitude.

    His Masterpiece

    Emile Zola

  • Up to the moment of that discovery, all was lassitude and indifference.

    Confessions Of Con Cregan

    Charles James Lever

  • But all the blue forces were broken, disorganized; there came an exhaustion, a lassitude.

    The Long Roll

    Mary Johnston

  • On waking in the morning we all p. 263experienced languor and lassitude.


    Charles Godfrey Leland

British Dictionary definitions for lassitude



physical or mental weariness

Word Origin for lassitude

C16: from Latin lassitūdō, from lassus tired
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

Word Origin and History for lassitude

early 15c., from Middle French lassitude (14c.), from Latin lassitudinem (nominative lassitudo) "faintness, weariness," from lassus "faint, tired, weary," from PIE *led- "slow, weary" (cf. Old English læt "sluggish, slow;" see late (adj.)), from root *le- "to let go, slacken" (see lenient).

Online Etymology Dictionary, © 2010 Douglas Harper

lassitude in Medicine




A state or feeling of weariness, diminished energy, or listlessness.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.