1. (noun)negligence, carelessness, neglect, nonperformance failure to act with the prudence that a reasonable person would exercise under the same circumstances Synonyms: carelessness, disuse, neglect, neglectfulness, nonperformance, disregard, sloppiness, negligence
2. (noun)negligence, neglect, neglectfulness the trait of neglecting responsibilities and lacking concern Synonyms: neglectfulness, carelessness, negligence, disuse, neglect, disregard, nonperformance