What does 'nonfeasance' mean in tort law?

In tort law, 'nonfeasance' specifically refers to the failure to act when there is a legal duty to do so. This term is significant because it underscores the principle that, in certain circumstances, individuals have a responsibility to take action to prevent harm to others. For instance, if a person is in a position to help someone in distress (such as a lifeguard on duty) and fails to do so, they may be held responsible for their inaction if it contributes to the harm that occurs. This contrasts with other forms of tortious action, which may involve proactive harmful conduct. Understanding nonfeasance is crucial as it highlights the legal obligation to intervene in situations where one’s inaction could lead to someone's injury or damage.