Source : Webster's Revised Unabridged Dictionary (1913)

Houri \Hou"ri\, n.; pl. {Houris}. [Per. h[=u]r[=i], h[=u]r[=a],
   h[=u]r; akin to Ar. h[=u]r, pl. of ahwar beautiful-eyed,
   black-eyed.]
   A nymph of paradise; -- so called by the Mohammedans.

Source : WordNet®

houri
     n 1: a voluptuously beautiful young woman [syn: {nymph}]
     2: (Islam) one of the dark-eyed virgins of perfect beauty
        believed to live with the blessed in Paradise