Definitions:
a long, soft feather or arrangement of feathers used by a bird for display or worn by a person for ornament

a long cloud of smoke or vapour resembling a feather as it spreads from its point of origin

a localized column of hotter magma rising by convection in the mantle, believed to cause volcanic activity in locations away from plate margins.

spread out in a shape resembling a feather

(of a bird) preen itself.