The term "PointerUp" refers to an event in web development that occurs when a pointing device, such as a mouse or touch screen, is released after being pressed down. This event is part of the Pointer Events API, which allows developers to handle input from various devices in a unified way. It is commonly used in interactive applications to trigger actions when a user lifts their finger or mouse button. In practical terms, the PointerUp event can be used to finalize actions like dragging an object, submitting a form, or stopping a drawing action. By listening for this event, developers can create more responsive and intuitive user interfaces that react appropriately to user input.