A more thorough explanation:

Definition: Long-arm is an adjective used to describe a statute that allows a court to have jurisdiction over a person or entity that is not physically present within the court's jurisdiction. This means that the court can reach out and "grab" someone who is outside of their normal jurisdiction.

Example: Long-arm jurisdiction can be used in cases where a person or company has committed a crime or caused harm in a state where they do not reside or have a physical presence. For example, if a person from California causes a car accident in New York, the New York court can use long-arm jurisdiction to hold the California resident accountable for their actions.

Explanation: The example illustrates how long-arm jurisdiction can be used to extend a court's reach beyond its normal boundaries. In this case, the court in New York is able to hold the California resident accountable for their actions, even though they are not physically present in New York. This is possible because of the long-arm statute, which allows the court to exercise jurisdiction over the out-of-state resident.