FILLET, in ordinary language, a band of metal, linen, or ribbon worn round the head. Also the fleshy part of the thigh; applied most commonly to veal. Also portions of meat or fish removed from the bone and served either flat or rolled together and tied round; the term is specially applied to the under-cut of the sirloin of beef, served whole or cut into steaks, and to slices of flat-fish removed from the bone. In anatomy, a collection of fibers passing upward from the anterior columns of the spinal cord. Also a similar bundle of fibers in the corpus callosum.

In architecture, a small flat face or band used principally between moldings to separate them from each other in classical architecture; in the Gothic, Early English, or decorated styles of architecture, it is also used on larger moldings and shafts.