noun A branching, hair-like structure that grows on the bodies of birds, used for flight, swimming, protection and display.
noun Long hair on the lower legs of a dog or horse, especially a draft horse, notably the Clydesdale breed. Narrowly only the rear hair.
noun One of the fins or wings on the shaft of an arrow.
noun A longitudinal strip projecting from an object to strengthen it, or to enter a channel in another object and thereby prevent displacement sideways or rotationally but permit motion lengthwise.
noun Kind; nature; species (from the proverbial phrase "birds of a feather").
noun One of the two shims of the three-piece stone-splitting tool known as plug and feather or plug and feathers; the feathers are placed in a borehole and then a wedge is driven between them, causing the stone to split.
noun The angular adjustment of an oar or paddle-wheel float, with reference to a horizontal axis, as it leaves or enters the water.