Eighth \Eighth\, a. [AS. eahto?a.]

1. Next in order after the seventh.

2. Consisting of one of eight equal divisions of a thing.

Eighth note (Mus.), the eighth part of a whole note, or semibreve; a quaver.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Eighth \Eighth\, n.

1. The quotient of a unit divided by eight; one of eight equal parts; an eighth part.

2. (Mus.) The interval of an octave.

Source: Webster's Revised Unabridged Dictionary (1913)