What is the meaning of Feathering?

present participle and gerund of feather

Plumage.

A feathered texture.

The fitting of feathers to arrows.

An arrangement of small arcs or foils separated by projecting cusps, frequently forming the feather-like ornament on the inner mouldings of arches.

Visible offshoots of the trails of ink written on overly absorbent paper.

Source: wiktionary.org