Source : Webster's Revised Unabridged Dictionary (1913)

Six \Six\, a. [AS. six, seox, siex; akin to OFries. sex, D. zes,
   OS. & OHG. sehs, G. sechs, Icel., Sw., & Dan. sex, Goth.
   sa['i]hs, Lith. szeszi, Russ. sheste, Gael. & Ir. se, W.
   chwech, L. sex, Gr. ??, Per. shesh, Skr. shash. [root]304.
   Cf. {Hexagon}, {Hexameter}, {Samite}, {Senary}, {Sextant},
   {Sice}.]
   One more than five; twice three; as, six yards.

   {Six Nations} (Ethnol.), a confederation of North American
      Indians formed by the union of the Tuscaroras and the Five
      Nations.

   {Six points circle}. (Geom.) See {Nine points circle}, under
      {Nine}.

Six \Six\, n.
   1. The number greater by a unit than five; the sum of three
      and three; six units or objects.

   2. A symbol representing six units, as 6, vi., or VI.

   {To be at six and seven} or {at sixes and sevens}, to be in
      disorder. --Bacon. Shak. Swift.

Source : WordNet®

six
     adj : denoting a quantity consisting of six items or units [syn: {6},
            {vi}, {half dozen}, {half a dozen}]

six
     n : the cardinal number that is the sum of five and one [syn: {6},
          {VI}, {sixer}, {sise}, {Captain Hicks}, {half a dozen},
         {sextet}, {sestet}, {sextuplet}, {hexad}]