Meaning of fret
Definition of fret
an ornamental pattern consisting of repeated vertical and horizontal lines (often in relief); "there was a simple fret at the top of the walls"
a small bar of metal across the fingerboard of a musical instrument; when the string is stopped by a finger at the metal bar it will produce a note of the desired pitch
(verb)
worry unnecessarily or excessively; "don't fuss too much over the grandchildren--they are quite big now"
(noun)
a genus of Viperidae