D defs.my
Entry 1 sense Webster, 1913

Advancing edge

· Ad·van·cing edge · IPA
01 The front edge (in direction of motion) of a supporting surface; -- contr. with following edge, which is the rear edge.
  1. 1.
    The front edge (in direction of motion) of a supporting surface; -- contr. with following edge, which is the rear edge.(Aëronautics)