Definition of negligent

< negligence

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neg·li·gent    (ngl-jnt) KEY 

ADJECTIVE:

1. Characterized by or inclined to neglect, especially habitually.
2. Characterized by careless ease or informality; casual.
3. Law Guilty of negligence.

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ETYMOLOGY:
Middle English, from Old French, from Latin neglegns, neglegent- present participle of neglegere, to neglect ; see neglect

OTHER FORMS:
negli·gent·ly(Adverb)

SYNONYMS:
negligent, derelict, lax, neglectful, remiss, slack¹

These adjectives mean guilty of a lack of due care or concern: an accident caused by a negligent driver; was derelict in his civic responsibilities; lax in attending classes; neglectful of her own financial security; remiss of you not to pay your bill; slack in maintaining discipline.