1. noun /ˈfɪlɪt/
a) A headband; a ribbon or other band used to tie the hair up, or keep a headdress in place, or just for decoration.
In secret shadow, farre from all mens sight: / From her faire head her fillet she vndight, / And laid her stole aside.
b) A thin strip of any material, in various technical uses.
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.
2. verb /ˈfɪlɪt/
Wikipedia foundation.