Definitions:
any of the flat appendages growing from a bird's skin and forming its plumage, consisting of a partly hollow horny shaft fringed with vanes of barbs

rotate the blades of (a propeller) about their own axes in such a way as to lessen the air or water resistance.

float or move like a feather

blend or smooth delicately

(of ink, lipstick, etc.) separate into tiny lines after application