Definitions of fillet:

noun: fastener consisting of a narrow strip of welded metal used to join steel members
noun: a longitudinal slice or boned side of a fish
noun: a boneless steak cut from the tenderloin of beef
noun: a bundle of sensory nerve fibers going to the thalamus
noun: a narrow headband or strip of ribbon worn as a headband
verb: cut into filets
verb: decorate with a lace of geometric designs