Negligent/ˈneɡlɪdʒənt/ Definition 1 of 2Pro Tip 1/3Responsibility Context Use 'negligent' to express failure in meeting responsibilities or expectations. The company was negligent in ensuring the safety of its products. Pro Tip 2/3Attention to Detail 'Negligent' implies a lack of carefulness or detail, often causing mistakes or problems. His negligent review of the document led to many errors. Pro Tip 3/3Personal Accountability Using 'negligent' implies that someone didn’t do what they were supposed to do. She was negligent in not informing us about the schedule change.