ferny adjective3 •Of or pertaining to ferns. •Covered in or filled with ferns; flanked or surrounded by ferns.We'll walk over the spring fields and through those ferny old woods. — 1939 •Resembling or characteristic of a fern, in appearance, smell, etc.All kinds of mosses grew by the stream—tufty, flat, ferny, and curly, green, yellow and a whitish kind that was tipped with scarlet sealing wax. — 1942 formsfernier · ferniest