\Ca*a"ba\ (k[.a]*[=a]"b[.a]), n. [Ar. ka'bah, lit., a
square building, fr. ka'b cube.]
The small and nearly cubical stone building, toward which all
Mohammedans must pray. [Written also {kaaba}.]
Note: The Caaba is situated in Mecca, a city of Arabia, and
      contains a famous black stone said to have been brought
      from heaven. Before the time of Mohammed, the Caaba was
      an idolatrous temple, but it has since been the chief
      sanctuary and object of pilgrimage of the Mohammedan
      world.