Eighth

Eighth is ordinal form of the number 8|eight.

Eighth may refer to:
 * One eighth, $1/8$ or ⅛, a fraction, one of eight equal parts of a whole
 * Eighth note (quaver), a musical note played for half the value of a quarter note (crotchet)
 * Octave, an interval between seventh and ninth
 * Eighth octave C, a C note
 * Eighth Lake, a lake by Inlet, New York