Chambers 1908 also has "a feather-like ornament". Any ideas what this is? Equinox ◑ 14:38, 24 March 2020 (UTC)
There's a meaning of the verb feather I can't quite describe. It's a way the ink spreads. See https://commons.wikimedia.orgview_image.php?q=Talk:feather&sq=Talk:feather&lang=en&file=File:Fountain_pen_ink_Feathering_example_with_Levenger_Cobalt_Blue_Ink.jpg for an example. --Simplificationalizer (talk) 18:44, 28 July 2021 (UTC)