(aviation) The airspeed displayed by an aircraft's airspeed indicator based on measurements from the pitot-static system; the airspeed used by pilots and air traffic control when flying and controlling aircraft.

(aviation) Dynamic pressure expressed as airspeed; the airspeed at sea level in the International Standard Atmosphere at which an airplane would experience the same dynamic pressure as it does in its current flight conditions; calibrated airspeed corrected for errors introduced by the compressibility of air at nonzero Mach numbers.

airspeed indicator