What does the term 'aerodynamics' refer to?

The term 'aerodynamics' refers specifically to the study of how air interacts with solid objects, particularly when those objects are in motion. This field involves examining the forces that arise from the motion of air, such as lift, drag, and thrust, which are critical in the design and operation of various vehicles, especially aircraft. Understanding aerodynamics is essential for engineers to optimize the shape and structure of aircraft, enhancing their performance and safety in flight.

While other aspects of aviation, like materials design, aircraft weight measurement, and engine efficiency, are important, they do not encompass the broader definition of aerodynamics, which focuses solely on the interaction between air and solid bodies in motion.