A "keypress" refers to the action of pressing a key on a keyboard, which can be physical or virtual. This action is commonly used in computing to input data, execute commands, or navigate software applications. Each key on a keyboard corresponds to a specific character or function, and when pressed, it sends a signal to the computer to perform a designated task. In programming, keypress events can be detected and handled by software to create interactive applications. For example, in web development, languages like JavaScript can capture keypresses to enhance user experience, such as responding to user input in real-time or triggering specific functions based on the keys pressed.