Source : WordNet®

one thousand
     adj : denoting a quantity consisting of 1,000 items or units [syn:
            {thousand}, {a thousand}, {1000}, {m}, {k}]

one thousand
     n : the cardinal number that is the product of 10 and 100 [syn:
         {thousand}, {1000}, {M}, {K}, {chiliad}, {G}, {grand}, {thou},
          {yard}]