Source : Webster's Revised Unabridged Dictionary (1913)

liad \l"i*ad\, n. [L. Ilias, -adis, Gr. ?, ? (sc. ?), fr. ?, ?,
   Ilium, the city of Ilus, a son of Tros, founder of Ilium,
   which is a poetical name of Troy.]
   A celebrated Greek epic poem, in twenty-four books, on the
   destruction of Ilium, the ancient Troy. The Iliad is ascribed
   to Homer.