Transonic refers to speeds that are close to the speed of sound, typically ranging from Mach 0.8 to Mach 1.2. At these speeds, an aircraft or object experiences a mix of subsonic and supersonic airflow, leading to unique aerodynamic challenges. In transonic flight, shock waves begin to form, which can affect lift and drag. This phase is critical for aircraft design, as engineers must consider factors like aerodynamics and control surfaces to ensure stability and performance. Understanding transonic behavior is essential for both commercial and military aviation.