In physics, "critically damped" refers to a specific condition in a damped harmonic oscillator, where the system returns to equilibrium as quickly as possible without oscillating. This occurs when the damping force is precisely balanced with the system's natural frequency, allowing it to settle down smoothly. In practical terms, critically damped systems are often seen in applications like automobile suspensions and door closers. These systems are designed to prevent overshooting and ensure a quick, stable return to rest, enhancing both performance and safety.