Aspect ratio

The relationship of the length (wingtip to wingtip), or span, of an airfoil to its width, or chord.

Aviation Maintenance Technician Handbook — General, p. G-2

Also defined in 3 more sources

The ratio of the length, or span, of an airplane wing to its width, or chord. For a nonrectangular wing, the aspect ratio is found by dividing the square of the span of the wing by its area. Aspect Ratio = span2 ÷ area.

Aviation Maintenance Technician Handbook — Airframe, p. G-3

The ratio of the length of an airfoil, such as a compressor blade, to its width.

Aviation Maintenance Technician Handbook — Powerplant, p. G-3

Span of a wing divided by its average chord.

Pilot's Handbook of Aeronautical Knowledge, p. G-4

Taught in GEN-H Procedures, GEN-H Concepts.