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The speed, especially of an aircraft, relative to the air.
(Aeronautics) the speed of an aircraft relative to the air in which it moves. Compare groundspeed
or air′ speed`,
the forward speed of an aircraft relative to the air through which it moves.
The speed of an aircraft relative to its surrounding air mass. The unqualified term "airspeed" can mean any one of the following. a. calibrated airspeed--Indicated airspeed corrected for instrument installation error. b. equivalent airspeed--Calibrated airspeed corrected for compressibility error. c. indicated airspeed--The airspeed shown by an airspeed indicator. d. true airspeed--Equivalent airspeed corrected for error due to air density (altitude and temperature).