- A branching, hair-like structure that grows on the wings of birds that allows their wings to create lift.
- Long hair on the lower legs of a dog or horse, especially a draft horse, notably the Clydesdale breed. Narrowly only the rear hair.
- One of the fins or wings on the shaft of an arrow.
- A longitudinal strip projecting from an object to strengthen it, or to enter a channel in another object and thereby prevent displacement sideways but permit motion lengthwise; a spline.
- Kind; nature; species (from the proverbial phrase "birds of a feather").
- 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.
- The angular adjustment of an oar or paddle-wheel float, with reference to a horizontal axis, as it leaves or enters the water.
(third-person singular simple present feathers, present participle feathering, simple past and past participle feathered)
- To cover or furnish with feathers.
- To arrange in the manner or appearance of feathers.
- The stylist feathered my hair.
- (intransitive, rowing) To rotate the oars while they are out of the water to reduce wind resistance.
- (aeronautics) To streamline the blades of an aircraft's propeller by rotating them perpendicular to the axis of the propeller when the engine is shut down so that the propeller doesn't windmill as the aircraft flies.
- After striking the bird, the pilot feathered the left, damaged engine's propeller.
- (carpentry, engineering) To finely shave or bevel an edge.
- (computer graphics) To intergrade or blend the pixels of an image with those of a background or neighboring image.
- To adorn, as with feathers; to fringe.
- To render light as a feather; to give wings to.
- To enrich; to exalt; to benefit.
- To tread, as a cock.
From Middle English fether, from Old English feþer, from Proto-Germanic *feþrō, from Proto-Indo-European *péth₂r̥ ~ pth₂én- (“feather, wing”), from *peth₂- (“to fly”). The Indo-European root is also the source of Greek πέτομαι (petomai), Albanian shpend (“bird”), Latin penna, Old Armenian թիռ (tʿiṙ).