[ lak-uh-dey-zi-kuhl ]
/ ˌlæk əˈdeɪ zɪ kəl /


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

Nearby words

  1. lachute,
  2. lacing,
  3. lacinia,
  4. laciniate,
  5. lack,
  6. lackaday,
  7. lackawanna,
  8. lacker,
  9. lackey,
  10. lackey moth

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

Examples from the Web for lackadaisically

  • But everything had not gone well, and he found it very difficult to carry himself otherwise than lackadaisically.

British Dictionary definitions for lackadaisically


/ (ˌlækəˈdeɪzɪkəl) /


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 lackadaisically



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