A "bystander" is a person who is present at an event or incident but does not take part in it. This term is often used in situations where someone witnesses an emergency or conflict but chooses not to intervene. Bystanders can play a crucial role in various scenarios, including accidents, bullying, or crimes. In some cases, bystanders may feel unsure about how to help or fear for their own safety. However, bystander intervention can be important in promoting safety and support, especially in situations involving bullying, domestic violence, or medical emergencies.