1. Lack of care, attention, or diligence in performing a duty or responsibility
The accident was caused by the driver's negligence.
O acidente foi causado pela negligência do motorista.
2. Legal term: failure to exercise reasonable care that results in damage or injury
The company was sued for medical negligence.
A empresa foi processada por negligência médica.
3. Carelessness or indifference in conduct or behavior
His negligence regarding his studies led to poor grades.
Sua negligência com relação aos estudos resultou em notas baixas.