fillet

Etymology

From Middle English filet, vylette, felet, filette, flette, from Old French filet, diminutive of fil (“thread”), from Latin fīlum (“thread”).

noun

1. (now rare) A headband; a ribbon or other band used to tie the hair up, or keep a headdress in place, or for decoration.
   She was talking of Raymond Duncan, a walking absurdity who dressed in an ancient handwoven Greek costume and wore his hair in long braids reaching to his waist, adding, on ceremonial occasions, a fillet of bay-leaves. 1970, John Glassco, Memoirs of Montparnasse, Mew York, published 2007, page 42
2. A thin strip of any material, in various technical uses.
3. (construction) A heavy bead of waterproofing compound or sealant material generally installed at the point where vertical and horizontal surfaces meet.
4. (engineering, drafting, CAD) A rounded relief or cut at an edge, especially an inside edge, added for a finished appearance and to break sharp edges.
5. A strip or compact piece of meat or fish from which any bones and skin and feathers have been removed.
6. (UK) A premium cut of meat, especially beef, taken from below the lower back of the animal, considered to be lean and tender; also called tenderloin.
   fillet steak
7. (architecture) A thin featureless moulding/molding used as separation between broader decorative mouldings.
8. (architecture) The space between two flutings in a shaft.
9. (heraldry) An ordinary equal in breadth to one quarter of the chief, to the lowest portion of which it corresponds in position.
10. The thread of a screw.
11. A colored or gilded border.
    Fairer than gods and naked as the moon, The foamy fillets at their ankles strewn Less marble-white than they 1911, George Sterling, The Swimmers
12. The raised moulding around the muzzle of a gun.
13. (woodworking) Any scantling smaller than a batten.
14. (anatomy) A fascia; a band of fibres; applied especially to certain bands of white matter in the brain.
15. The loins of a horse, beginning at the place where the hinder part of the saddle rests.

verb

1. (transitive) To slice, bone or make into fillets.
2. (transitive) To apply, create, or specify a rounded or filled corner to.