Source : Webster's Revised Unabridged Dictionary (1913)

Siberian \Si*be"ri*an\, a. [From Siberia, Russ. Sibire.]
   Of or pertaining to Siberia, a region comprising all northern
   Asia and belonging to Russia; as, a Siberian winter. -- n. A
   native or inhabitant of Siberia.

   {Siberian crab} (Bot.), the Siberian crab apple. See {Crab
      apple}, under {Crab}.

   {Siberian dog} (Zo["o]l.), one of a large breed of dogs
      having erect ears and the hair of the body and tail very
      long. It is distinguished for endurance of fatigue when
      used for the purpose of draught.

   {Siberian pea tree} (Bot.), a small leguminous tree ({Cragana
      arborescens}) with yellow flowers. It is a native of
      Siberia.

Source : WordNet®

Siberian
     n : a native or inhabitant of Siberia

Siberian
     adj : of or relating to or characteristic of Siberia or the
           Siberians; "Siberian natural resources"; "Siberian coal
           miners"; "the Siberian tundra"