Eighth a. : Next in order after the seventh.

Eighth a. : Consisting of one of eight equal divisions of a thing.

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

Eighth n. : The interval of an octave.

Example:
What is an enjoyable novel that an Eighth grade boy can read for pleasure?

Taxonomy
number 8, glyph, eighth day, holy number, free encyclopedia, BCE, the Eight, duration, wealth, Eights, song, suit, babies, lucky number, sports, games, aliquot sum, Fibonacci number.

Defination from the web: