feather edge

feather edge (plural feather edges)

1. An edge of a board, plank, etc. that has been made very thin.

feather edge (third-person singular simple present feather edges, present participle feather edging, simple past and past participle feather edged)

1. (transitive) To give a very thin edge to.
   • 1944, War Department Technical Manual, volume 5, number 240, page 60:

     Featheredging is a process in preparing the photographs for mosaicking and involves cutting, tearing, and sandpapering the back of the print along its edges in such a way that the edge of the print is thin and will make a smooth match with adjoining prints.

• featheredge