How is the chord of a wing defined?

The chord of a wing is defined as the straight line distance between the leading edge and the trailing edge of the wing. This measurement reflects the width of the wing at a given point and is crucial for understanding aerodynamics, as it impacts lift, drag, and overall performance. By knowing the chord length, engineers can calculate the wing's characteristics and how it interacts with the airflow during flight. The other choices do not accurately describe the chord; for example, measuring from the tip to the root involves a different aspect of the wing's geometry, such as its span, while measuring from wingtip to wingtip refers to span as well. The root to the fuselage doesn't represent a specific aerodynamic characteristic like the chord does.