What is a definition of fret on guitqr?

On a guitar or similar stringed instrument, a fret is a thin strip of material, typically metal, embedded into the fingerboard/neck of the instrument at specific intervals. Frets are used to divide the string's vibrating length into specific parts, corresponding to musical notes. When a string is pressed down onto the fret, its effective vibrating length is shortened and the pitch of the note played is raised. The position and spacing of frets along the neck of the instrument determine the specific pitches that can be played on each string. Frets allow guitarists to produce precise notes by pressing the strings down at the appropriate fret.