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Longman Dictionary of Contemporary English
▪ a lackadaisical approach to security
The Collaborative International Dictionary

lackadaisical \lack`a*dai"si*cal\ (l[a^]k`[.a]*d[=a]"z[i^]*kal), a. [From Lackadaisy, interj.]

  1. Affectedly pensive; languidly sentimental; dreamy.

  2. Lacking spirit or liveliness; lethargic; listless; languid.

  3. Indolent; lazy; idle, especially in a dreamy manner. [PJC] -- Lack`a*dai"si*cal*ly, adv.

Douglas Harper's Etymology Dictionary

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.


a. Showing no interest or enthusiasm.

  1. adj. lacking spirit or liveliness; "a lackadaisical attempt"; "a languid mood"; "a languid wave of the hand"; "a hot languorous afternoon" [syn: dreamy, languid, languorous]

  2. idle or indolent especially in a dreamy way; "she was annoyingly lackadaisical and impractical"; "a...lackadaisical, spiritless young man-about-town"- P.G.Wodehouse

Usage examples of "lackadaisical".

Jensens, a family who lived toward the end of the block but who were the constant targets of complaints because of the lackadaisical way they handled their dog.

Humans tend to treat important Starfleet protocols in an extremely lackadaisical fashion, as we have seen on this very mission.

The warm sunshine urged her to give into the lackadaisical daydream of closing her eyes and allowing the day to pass to the easy rhythm of the hoofbeats on the dirt.

She wondered if he was late for work, too, or whether it was just home things that he had grown so lackadaisical about.

The prospect of that trip interested him, in a lackadaisical sort of way.

The first few shots were often lackadaisical as the gun barrels were still cool and thus caused the balls to fly low.

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

However, they had been so lackadaisical in organizing that they had never actually put him in charge.

Teachers despair at how educational standards have deteriorated, and how lackadaisical students have become.

Marie Mironoff, you have only to give her a pair of earrings instead of your lackadaisical verses.

Madame affects the lackadaisical, and looks sidewise at her husband with an eye half disarmed.

I like to watch the tiny damsels decked out like reliquaries, and already affecting coquettish and lackadaisical ways.

As for the women, they were always the same, those frightful women you all know, ugly, tired looking, drooping, and walking along in their lackadaisical manner, with that air of foolish superciliousness which they assume, I do not know why.

What he needs is a few months in Auschwitz, to teach him what lackadaisical Perfomiance in wartime means.

The prize fight was now in its tenth round, and from the glimpse Tommy got of the screen, was as lackadaisical as ever with the Kenyon Kid and Phil Orr waltzing around in interminable clinches.