What is the speed defined as V2?

The definition of V2 is the speed at which the aircraft can safely climb with one engine inoperative during takeoff. This speed ensures that in the event of an engine failure shortly after takeoff, the aircraft can maintain a positive climb rate. V2 is critical for ensuring the safety of the flight, allowing the pilot to control the aircraft and transition to a stable flight profile without descending. It is calculated based on the aircraft's weight, configuration, and performance characteristics, thus making it a vital aspect of operational safety and performance during the critical phase of climb after takeoff.