Define Vmo and its limitation for the 737-800.

Vmo, or Maximum Operating Speed, is specifically defined as the maximum airspeed that an aircraft can safely fly in level flight without exceeding structural limits. For the Boeing 737-800, this speed is set at 340 knots indicated airspeed (KIAS), making it crucial for safe operation during various phases of flight.

The limitation associated with Vmo includes constraints on the aircraft's performance to prevent structural damage from excessive loads that could occur at higher speeds. Exceeding Vmo can result in increased aerodynamic stresses on the airframe, necessitating adherence to operational speeds established during the design and testing of the aircraft.

Understanding Vmo is essential for pilots to ensure they operate within safe parameters, allowing for effective flight maneuvers while preserving the aircraft's structural integrity. This answer accurately reflects the definition and limitation of Vmo for the 737-800, emphasizing its role in maintaining safety in flight operations.