or FRETTE, in architecture, a kind of knot or ornament, consisting of two lists or small fillets variously interlaced or interwoven, and running at parallel distances equal to their breadth.

FERT, in heraldry, a bearing composed of six bars, crossed, and variously interlaced. Some call it the true-lover's knot. See HERALDRY.

in music, signifies a kind of stop on some instruments, particularly bass-viol and lutes. Frets consist of strings tied round the neck of the instrument, at certain distances, within which such and such notes are to be found.