01 a. Inattentive to duty; careless; neglectful; indifferent.
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1.
Inattentive to duty; careless; neglectful; indifferent.
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2.
Rashly negligent; utterly careless or heedless.“It made the king as reckless as them diligent.” — Sir P. Sidney.
Syn.
Heedless; careless; mindless; thoughtless; negligent; indifferent; regardless; unconcerned; inattentive; remiss; rash.