Abkhasia, or Abasia, a district on the coast of the Black Sea (lat. 42° 30' to 44° 45' N.; long. 37° 3' to 40° 36' E.), having the Caucasus to the N. and Mingrelia to S.E. Mountainous, with fertile valleys. Ceded to Russia by Turkey, 1824. The population. owing to emigrations, is inconsiderable. Sukumkaleh is the chief town.