Definition of lackadaisical in English:

lackadaisical

adjective

  • Lacking enthusiasm and determination; carelessly lazy.

    ‘a lackadaisical defence left Spurs adrift in the second half’
    • ‘I want to be organized, but I'm just too lackadaisical to get things in order.’
    • ‘The cast and filmmakers are largely to blame, as they treat the material in a lackadaisical manner, while also telegraphing too many plot points ahead of time.’
    • ‘The lackadaisical attitude of the members is one of the main impediments to the club expanding its activities.’
    • ‘I don't want people to get the impression the school will have a lackadaisical approach to teaching though.’
    • ‘He still is too inconsistent and too lackadaisical.’
    • ‘There was a lackadaisical attitude to the extension of the copyright term in the European Union.’
    • ‘The President is remarkably lackadaisical about finding the senior administration official who leaked the identity of a CIA operative.’
    careless, lazy, lax, unenthusiastic, half-hearted, uninterested, lukewarm, indifferent, uncaring, unconcerned, casual, offhand, blasé, insouciant, leisurely, relaxed
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Origin

Mid 18th century (also in the sense ‘feebly sentimental’): from lackaday or its obsolete extended form lackadaisy.

Pronunciation

lackadaisical

/ˌlakəˈdeɪzɪk(ə)l/