Source : Webster's Revised Unabridged Dictionary (1913)

Mastaba \Mas"ta*ba\, n. Also Mastabah \Mas"ta*bah\ . [Ar.
   ma[,c]tabah a large stone bench.]
   1. In Mohammedan countries, a fixed seat, common in dwellings
      and in public places.

   2. (Egyptology) A type of tomb, of the time of the Memphite
      dynasties, comprising an oblong structure with sloping
      sides (sometimes containing a decorated chamber, sometimes
      of solid masonry), and connected with a mummy chamber in
      the rock beneath.

Source : WordNet®

mastaba
     n : an ancient Egyptian mudbrick tomb with a rectangular base
         and sloping sides and flat roof; "the Egyptian pyramids
         developed from the mastaba" [syn: {mastabah}]