careless Meaning in the Cambridge English Dictionary
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Meaning of “careless” in the English Dictionary

"careless" in British English

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uk   /ˈkeə.ləs/  us   /ˈker-/

careless adjective (NO ATTENTION)

B1 not taking or ​showing enough ​care and ​attention: My son's ​teacher says that his ​work is often ​rather careless. He made a careless ​remark (= one made without ​thinking) about her ​appearance that really ​upset her.
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careless adjective (NO WORRY)

literary relaxed, ​natural, and ​free from ​worry
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adverb uk   us   /-li/
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B2 He told me off for ​driving carelessly.
noun [U] uk   us   /-nəs/
(Definition of careless from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"careless" in American English

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 us   /ˈkeər·ləs/

careless adjective (WITHOUT ATTENTION)

not using enough ​care: Careless ​driverscauseaccidents. My son’s ​schoolwork is often careless and ​sloppy.
adverb  us   /ˈker·lə·sli, ˈkær-/
She carelessly ​left her ​purse on the ​train.
noun [U]  us   /ˈker·lə·snəs, ˈkær-/
Carelessness ​leads to ​shoddywork.
(Definition of careless from the Cambridge Academic Content Dictionary © Cambridge University Press)
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