Autopilot is a system that controls a vehicle, especially an airplane, without constant human input. When a pilot engages the autopilot during a long flight, the computer takes over routine tasks like maintaining altitude and heading, freeing the pilot to monitor other instruments and plan for landing.

Modern autopilot systems are sophisticated: they can follow programmed routes, adjust for weather conditions, and even land planes in certain situations. But they don't replace human pilots. Pilots still make critical decisions, handle emergencies, and monitor everything the autopilot does. Think of autopilot as a skilled assistant rather than a replacement.

The word also describes doing something automatically, without really thinking about it. When you walk to school on autopilot, you're following such a familiar route that your mind can wander while your body handles the navigation. A musician practicing scales might play them on autopilot after years of repetition.

Being on autopilot can be useful for routine tasks, but it becomes a problem when you're doing something that requires full attention. If you're on autopilot during class, you might miss important instructions. The key is knowing when to switch autopilot off and engage your full focus.