01 a. Free from care or anxiety. hence, cheerful; light-hearted.
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1.
Free from care or anxiety. hence, cheerful; light-hearted.“Sleep she as sound as careless infancy.” — Shak.
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3.
Without thought or purpose; without due care; without attention to rule or system; unstudied; inconsiderate; spontaneous; rash; as, a careless throw; a careless expression.“He framed the careless rhyme.” — Beattie.
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4.
Not receiving care; uncared for.[R.]“Their many wounds and careless harms.” — Spenser.
Syn.
Negligent; heedless; thoughtless; unthinking; inattentive; incautious; remiss; supine; forgetful; regardless; inconsiderate; listless.