1. noun [ˈfɛð̥ə/|/ˈfɛð.ə(ɹ),ˈfɛð̥ɚ/
A branching, hair-like structure that grows on the wings of birds that allows their wings to create lift.
Notice, too, that the shaft is not straight, but bent so that the upper surface of the feather is convex, and the lower concave.
2. verb [ˈfɛð̥ə/|/ˈfɛð.ə(ɹ),ˈfɛð̥ɚ/
a) To cover with feathers.
The stylist feathered my hair.
b) To arrange in the manner or appearance of feathers.
After striking the bird, the pilot feathered the left, damaged engines propeller.
Wikipedia foundation.