Source : Webster's Revised Unabridged Dictionary (1913)

Eight \Eight\, n.
   1. The number greater by a unit than seven; eight units or
      objects.

   2. A symbol representing eight units, as 8 or viii.

Eight \Eight\, n. [See {Ait}.]
   An island in a river; an ait. [Obs.] ``Osiers on their
   eights.'' --Evelyn.

Eight \Eight\, a. [AS. eahta; akin to OS. ahto, OFries. achta,
   D. & G. acht, OHG. ahto, Icel. [=a]tta, Sw. [*a]tta, Dan.
   otte, Goth. ahtau, Lith. aszt?ni, Ir. & Gael. ochd, W. wyth,
   Armor. eich, eiz, L. octo, Gr. ?, Skr. ash?an. ????. Cf.
   {Octave}.]
   Seven and one; as, eight years.

Source : WordNet®

eight
     adj : being one more than seven [syn: {8}, {viii}]

eight
     n 1: the cardinal number that is the sum of seven and one [syn: {8},
           {VIII}, {eighter}, {eighter from Decatur}, {octad}, {ogdoad},
           {octonary}, {octet}]
     2: a group of United States painters founded in 1907 and noted
        for their realistic depictions of sordid aspects of city
        life [syn: {Ashcan School}]