Wingspan

[Oralee]

[The space between] a womans upper thighs just below the [pubic] region. More noticeable from the rear and more pronounced on [thinner] girls.

[Dave Paprocki]

The maximum extent across the wings of an aircraft or of a bird or other flying animal, measured from tip to tip.

[Becky]

the distance between the ends of the wings of a bird, insect, or aircraft