without interest, vigor, or determination; listless; lethargic: a lackadaisical attempt.
lazy; indolent: a lackadaisical fellow.

Origin of lackadaisical

1760–70; lackadais(y) (variant of lackaday) + -ical
Related formslack·a·dai·si·cal·ly, adverblack·a·dai·si·cal·ness, noun

Synonyms for lackadaisical Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for lackadaisical

Contemporary Examples of lackadaisical

Historical Examples of lackadaisical

  • The last words of his speech he whined out in a lackadaisical tone.

    Weighed and Wanting

    George MacDonald

  • Our interest in the thing is all lackadaisical, a kind of bun-fight of pet notions.

    The Freelands

    John Galsworthy

  • The woman short, slight, and lackadaisical, though rather pretty.

    The Coxswain's Bride

    R.M. Ballantyne

  • Marriage is a lackadaisical proceeding at best; but there is no resource.

    Paul Clifford, Complete

    Edward Bulwer-Lytton

  • Don't indulge in tête-à-têtes, or in lackadaisical glances of the eye.

British Dictionary definitions for lackadaisical



lacking vitality and purpose
lazy or idle, esp in a dreamy way
Derived Formslackadaisically, adverblackadaisicalness, noun

Word Origin for lackadaisical

C18: from earlier lackadaisy, extended form of lackaday
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 lackadaisical

1768 (Sterne), from interjection lackadaisy "alas, alack" (1748), an alteration of lack-a-day (1690s), from alack the day (1590s). Hence, "given to crying 'lack-a-day,' vapidly sentimental." Sense probably altered by influence of lax. Related: Lackadaisically.

Online Etymology Dictionary, © 2010 Douglas Harper