
A backward inclination of an airfoil from root to tip in a way that causes the leading edge and often the trailing edge to meet relative wind obliquely, as wingforms that are swept back.
Found on
http://www.aerofiles.com/glossary.html

The angling back of the wings from the centre, to increase directional stability or reduce drag at high speed
Found on
http://www.encyclo.co.uk/local/22135

A backward inclination of an airfoil from root to tip in a way that causes the leading edge and often the trailing edge to meet relative wind obliquely, as WINGFORMs that are swept back.
Found on
https://www.encyclo.co.uk/local/22323

the shape of, or the angle formed by, an airplane wing or other airfoil the leading or trailing edge of which slopes backward from the fuselage.
Found on
https://www.infoplease.com/dictionary/sweepback
No exact match found.