1. A little band, especially one intended to encircle the hair of the head. A belt her waist, a fillet binds her hair. (Pope)
2. A piece of lean meat without bone; sometimes, a long strip rolled together and tied.
a fillet of beef is the under side of the sirlom; also called tenderloin. A fillet of veal or mutton is the fleshy part of the thigh. A fillet of fish is a slice of flat fish without bone. Fillet of a fenny snake.
3. A thin strip or ribbon; especially., a strip of metal from which coins are punched. A strip of card clothing. A thin projecting band or strip.
4. (Science: machinery) a concave filling in of a reentrant angle where two surfaces meet, forming a rounded corner.
5. A narrow flat member; especially, a flat molding separating other moldings; a reglet; also, the space between two flutings in a shaft.
6. An ordinary equaling in breadth one fourth of the chief, to the lowest portion of which it corresponds in position.
7. (Science: mechanics) The thread of a screw.
8. A border of broad or narrow lines of colour or gilt.
9. The raised molding about the muzzle of a gun.
10. Any scantling smaller than a batten.
11. (Science: anatomy) a fascia; a Band of fibres; applied
especially. To certain bands of white matter in the brain.
12. The loins of a horse, beginning at the place where the hinder part of the saddle rests. Arris fillet. See arris.
Origin: oe. Filet, felet, fr. OF. Filet thread, fillet of meat, dim. Of fil a thread, fr. L. Filum. See Fille a row.