Definition of careless in English:

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Pronunciation: /ˈkerləs/


1Not giving sufficient attention or thought to avoiding harm or errors: she had been careless and had left the window unlocked
More example sentences
  • Employers have every right to take reasonable steps to protect themselves from harm from malicious or careless workers.
  • Pray that whatever has caused them to be so careless doesn't harm them or someone else.
  • It is not fair on others to behave in a careless, foolhardy fashion.
heedless, irresponsible, impetuous, reckless, foolhardy;
cavalier, supercilious, devil-may-care
shoddy, slapdash, slipshod, slovenly, negligent, lax, slack, disorganized, hasty, hurried
informal sloppy, slaphappy
thoughtless, insensitive, indiscreet, unguarded, incautious, inadvertent
heedless of, unconcerned with, indifferent to, oblivious to
1.1(Of an action or its result) showing or caused by a lack of attention: he admitted to careless driving a careless error
More example sentences
  • In planning a quilt, my reaction to this ordered system has always been a reckless measuring which produces careless results.
  • Why 100,000 Americans die each year in our nation's hospitals as a result of careless medical mistakes.
  • And, yes, there were tragic accidents to mar it, resulting from careless handling of the fireworks.
1.2 [predicative] (careless of/about) Not concerned or worried about: he was careless about his own safety
More example sentences
  • The three main parties focus on these ‘swing’ voters and the issues that concern them, careless of the views of the rest of us.
  • That made him careless about liberty and willing to use the authority of the state to create the sort of society he wanted to see.
  • No one suggests that the government should be casual or careless about the terrorists in our midst.
1.3Showing no interest or effort; casual: she gave a careless shrug
More example sentences
  • So we covered 1,500 kilometres and more - the actual spots seldom reveal themselves to a casual or careless traveller.
  • The careless, the casual, the thoughtless reader will come away from them no wiser than he was before.
  • ‘I never felt like I belonged in that world,’ he says with a careless shrug.


Old English carlēas 'free from care' (see care, -less).

For editors and proofreaders

Syllabification: care·less

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